When buying bitcoin, as long as the payment is within the limits set by your card provider and the transaction is approved by your issuing bank, any purchase under $10,000 is instant.
When selling bitcoin, the payout speed depends on your payment card’s settlement speed, which is set by your card provider.
Please also note that while NOAH does not impose any buy or sell limits as long as the transaction exceeds $20, Visa and Mastercard set their own daily limits, which may affect the success of your transaction.