Whoever is thinking about that Coinbase loan: you would pay %% interest on your loans and then you would STILL pay cap gains, since you are converting your btc to cbBTC. See here:
When a user borrows USDC against their Bitcoin, the collateral is automatically converted to Coinbase Wrapped Bitcoin (cbBTC) on a 1:1 basis and transferred to the Morpho protocol.
converted=sold. Basically, you are selling btc for cbBTC before getting a loan.