For decades, spending meant reducing cash in an account or adding debt to a separate credit line. Onchain products are beginning to arrange those relationships differently. A portfolio can remain visible as a position while a payment is funded through another mechanism.
The innovation lives in the choreography between ownership, collateral, liquidity and settlement.
THREE UNDERLYING DECISIONS
The same checkout can begin from a different relationship to value.
Convert
Value changes form at or before the moment of payment.
This is the most direct mental model: an eligible asset funds a spendable balance, and the product explains the conversion and card economics around it.
Prefund
A designated balance is made ready for ordinary use.
The user chooses what enters the spending environment in advance. The boundary between a wider portfolio and everyday money remains explicit.
Borrow
Liquidity is created against a position that remains invested.
The payment experience now carries the logic of credit: collateral value, interest, repayment and liquidation conditions matter even when the checkout itself feels routine.
HOW TO READ THE PRODUCT
Look past the rectangle.
Read the source of liquidity
Ask which asset, account or credit facility ultimately responds when the card is used.
Read the boundary of control
Custody before payment and settlement at payment can involve different actors and different permissions.
Read the cost in context
Card fees, provider conversion fees, credit costs and external network costs describe different events and should not be collapsed into one number.
Read the exit
The routes available when money leaves reveal as much about a modern account as the way funds enter.
LIQUIDITY QUESTIONS
What changes beneath the checkout.
Similar payments can begin from conversion, a prepared balance or credit against an existing position.
Can crypto be spent without selling the position first?
Some products create credit against collateral, allowing the position to remain in place while borrowed liquidity funds spending. Other products still rely on conversion or a separately prepared balance.
What changes when a payment is funded by borrowing?
Interest, collateral value, repayment and possible liquidation become part of the payment decision even when the card experience feels ordinary.
Can every cost be reduced to one card fee?
No. Card charges, provider conversion, credit costs and external network costs belong to different events and should be read separately.
Is borrowing against crypto cost-free?
No. Interest, collateral requirements and liquidation risk can apply even when the purchase itself looks like an ordinary card payment.
What is a prefunded spending balance?
It is a designated balance prepared before checkout, often separate from the rest of a wallet or account portfolio.