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, 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 "for security and fraud prevention purposes, this hold time cannot be altered" 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, Cash App or Kraken. Signing up and buying is usually quick; the step that catches people out is the first withdrawal — Cash App's own help says that if it's your first time withdrawing Bitcoin "you may need to enter some additional personal information before making a withdrawal". Get that cleared before you're ready to pay, not while an order is 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.
We accept Bitcoin, Ethereum, USDC and Solana — any of them works. USDC is the least stressful for a first-timer because it tracks the dollar 1:1, so the order total is the amount, with no price drift between buying and sending. If you'd rather use BTC, ETH or SOL, that's completely fine — just send the exact total shown at checkout.
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 why "I underpaid" happens. 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 USDC, 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 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). It would be a bad afternoon to buy exactly enough for an order and then find you can't move it.
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 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, checked on July 25, 2026: Coinbase's available-balance and pricing-and-fees help articles, and Cash App's bitcoin-withdrawal help article. Their terms can change — the preview screen inside your app is always the final word.