How to get crypto to pay — starting from zero
Short answer: buy on an app you've already passed ID checks on, and fund it with a debit card if you want to pay today — crypto bought with a linked bank account is commonly held and can't be sent for days. Buy USDC to keep the math simple (on Cash App, buy Bitcoin — it carries no other coin), a few dollars past your order total so the network fee doesn't come out of the payment, then withdraw it to the address at checkout.
If you've never held cryptocurrency, a crypto-only checkout looks like a wall. It isn't — the buying part takes a few minutes on an app you may already have. But there is one step almost nobody warns you about, and it's the reason first-time buyers end up stuck with a balance they can see and can't spend. So we'll start there.
The trap: a purchase you're not allowed to send
Buying crypto and being able to send it are two different things. When you fund an exchange with a linked bank account, the platform typically places a hold on that deposit. You can watch the balance sitting in your account the whole time — you just can't move it anywhere.
Coinbase says it plainly in its own help centre: cash deposits "may be placed on hold and won't be immediately available to send or cash out", and during that period you can't "send crypto purchased with these funds until the hold is lifted". It adds that the hold time cannot be altered for security reasons, and that "Coinbase Support cannot reduce the hold time". Its own stated workaround is the useful part: "To send crypto … instantly, deposit funds using a debit card."
From zero to paid, step by step
In the US most people use Coinbase, Kraken or Cash App, and the difference between them matters before you spend a dollar. Coinbase and Kraken carry all five coins we take. Cash App is Bitcoin only — its own help centre states that it "only supports Bitcoin (BTC)" and does "not support any other type of cryptocurrency" — so on Cash App you'll pay in BTC, which works here exactly as well as the rest. Then clear the app's ID check before you're ready to pay: Cash App's help says that on a first Bitcoin withdrawal "you may need to enter some additional personal information", and that is a bad thing to discover with an order waiting.
This is the one that decides your whole timeline. Coinbase's help page states that cash deposits may be placed on hold, and that during the hold you cannot "send crypto purchased with these funds until the hold is lifted" — the hold "cannot be altered" and "Coinbase Support cannot reduce" it. Its own stated fix: "To send crypto … instantly, deposit funds using a debit card." A linked-bank (ACH) purchase can leave you holding crypto you're unable to move for days. Debit or wire, and you can send right away.
Buy USDC if you have the choice — it tracks the dollar 1:1, so the order total is the amount and there's no rate to work out. On Cash App, buy Bitcoin; on Coinbase or Kraken, take your pick of BTC, ETH, USDC, USDT or SOL. Whichever you choose, buy a few dollars past your order total. The network fee to send it comes out of the amount you send rather than off a separate balance, so buying the total to the cent leaves you a fraction short at the final step — the single most common way a first payment lands under. The buffer costs you nothing: whatever you don't send stays yours.
Two things only. Pick the network by name on the withdrawal screen rather than trusting the default, and make the "you will receive" / "recipient gets" figure equal your order total — the app takes its network fee out of the number you typed, which is exactly what the buffer in step 3 is there to absorb. Both checks are walked through on how to pay with crypto.
When the send completes your app shows a transaction ID (hash). Save it. It's a public receipt anyone can look up on a block explorer, it's how we match your payment to your order, and it's the first thing that resolves any question about where a payment went. Here's what happens next →
What it actually costs
We don't take a cut of any of this and we're not going to quote another company's prices as though they were fixed. What we can tell you is where to look. Coinbase's fee page states that its trading fees are "calculated at the time you place your order" and vary with "your chosen payment method, order size, market conditions" and more, and that a spread is also built into the quoted price — both are shown on the preview screen before you confirm anything. Separately, sending crypto off a platform incurs a network fee, which is why the amount that lands can be smaller than the amount you typed.
Practical version: read the preview screen, and when you withdraw, check the "you will receive" line rather than the box you typed in. That's the number that has to match your order total.
Check the minimums before you buy, not after
Withdrawal minimums are per-app and per-coin, and they bite hardest if you buy exactly enough to cover an order. Cash App, for instance, requires at least 0.001 bitcoin for a standard-speed withdrawal, with a 0.00005 bitcoin minimum on its faster Rush and Priority speeds. Check your app's limit against your order total first — every VoltVault product page shows the live approximate amount in BTC, ETH, SOL and USDC next to the price.
What we don't do
- No affiliate links, no referral codes, no kickback. Those apps are named because they're the ones most US buyers already have — we earn exactly nothing either way.
- We'll never ask for your exchange login, password, recovery phrase or seed words. Not by email, not on chat, not ever. Nobody legitimate needs them, and anyone who asks is stealing from you.
- We can't act inside your account. Holds, limits and verification are between you and your app — we have no visibility into any of it, and we'd rather say so than pretend otherwise.
- Nothing here is financial advice. Buy only what you need for the order you want; you don't have to become a crypto person to buy a phone.
Common questions
I bought Bitcoin but the app won't let me send it — what happened?
Almost certainly a hold on the cash you funded with. Coinbase's help page says cash deposits may be placed on hold, and that while that hold is active you can't send crypto purchased with those funds off the platform — the hold time cannot be altered, and Coinbase Support cannot reduce it. You'll get an email telling you the date the funds become available, and another when they do. Nothing is lost; you just have to wait it out. Funding with a debit card avoids the wait next time.
What's the fastest way to go from no crypto at all to a paid order?
Use an app where you have already cleared identity verification, fund it with a debit card rather than a bank transfer, buy slightly more than the order total in USDC on Coinbase or Kraken (or in Bitcoin if you're on Cash App, which carries Bitcoin only), then withdraw it to the address shown at checkout. Done in one sitting. The slow path is a linked-bank (ACH) purchase, where the crypto can sit unsendable for days even though it's showing in your balance.
How much crypto should I actually buy?
A few dollars more than the order total. Sending crypto costs a network fee, and that fee is taken out of the amount you send rather than charged separately — so if you buy the total exactly, the amount that lands is a little under it. Buying a small buffer covers the fee and any minimum your app enforces, and the remainder simply stays in your account. On the coins where the price moves — BTC, ETH and SOL — the buffer also absorbs any drift between buying and sending; in USDC there is no drift to absorb, because a dollar is a dollar.
Which apps can send the coins you accept?
Coinbase and Kraken carry all five — Bitcoin, Ethereum, USDC, USDT and Solana. Cash App's help centre states that it only supports Bitcoin and no other cryptocurrency, so if Cash App is the app you already have, buy Bitcoin and pay in Bitcoin: it settles here the same as any other coin. Whichever app you use, pick the network by name on the withdrawal screen instead of trusting the default.
How much does it cost to buy crypto and send it?
We earn nothing from it and we can't quote another company's pricing, so here's the honest version: Coinbase's fee page says its trading fees vary by payment method, order size and market conditions, and that a spread is also included in the quoted price — both are shown on the preview screen before you confirm. A separate network fee applies when you send crypto off the platform. Read the preview screen; it's the only number that's actually yours.
Is there a minimum amount I can send?
It depends on the app and the coin, so check before you buy rather than after. Cash App, for example, requires at least 0.001 bitcoin for a standard-speed withdrawal (its faster Rush and Priority speeds have a 0.00005 bitcoin minimum). Buying a little past your order total, as in step 3, clears both the minimum and the network fee in one go.
Do you get paid if I sign up for Coinbase or Cash App?
No. There are no affiliate links, referral codes or kickbacks anywhere on this page — those apps are named simply because they're the ones most US buyers already have. We also have no visibility into and no control over your account with them, and we will never ask for your exchange login, password, recovery phrase or seed words. Nobody legitimate ever needs those.
Can I pay with a card or bank transfer instead?
Not with us — VoltVault takes payment only in Bitcoin, Ethereum, USDC, USDT or Solana. That's deliberate: no processor in the middle means no chargebacks, no frozen funds and lower costs, which is part of why the prices are what they are. Your card or bank still gets used, just one step earlier, to buy the crypto.
Third-party details on this page are quoted from each company's own public help documentation: Coinbase's available-balance and pricing-and-fees help articles and Cash App's bitcoin-withdrawal article, checked on July 25, 2026; Cash App's deposit-bitcoin article, which states its supported-cryptocurrency policy, re-checked on July 29, 2026. Their terms can change — the preview screen inside your app is always the final word.