US card debt hits $1.29 trillion as Bitcoin loans expose a collateral divide

US credit-card balances reached $1.29 trillion in the third quarter, the New York Fed reported on Nov. 10. Bitcoin-backed loans advertise lower borrowing rates, but the comparison comes with a different risk: losing the collateral in an automatic sale.

The New York Fed's report puts card balances $22 billion higher than the previous quarter and $52 billion higher than a year earlier.

Separately, the Federal Reserve's latest measure of interest assessed on card accounts was 22.36%, while Coinbase advertises crypto-backed borrowing from 5.1%.

That gap can translate into substantially lower modeled interest costs, but accessing it requires assets. A $10,000 payout would require $25,500 in Bitcoin at a chosen 40% initial loan-to-value ratio once the processing fee is financed.

The rate may be attractive, but the collateral can be sold automatically if the loan becomes too large relative to its backing.

What the lower rate buys

Consider a constant $10,000 card balance for one year, with no principal repayments and simple interest at the Fed's 22.36% measure, and the modeled interest cost is $2,236.

For Coinbase's variable-rate product, assume a payout worth $10,000 in USDC and hold the advertised 5.1% rate constant for a year. Coinbase's variable-loan processing fee is 2% on the first $250,000, with 1% charged on amounts above that tier.