This requires a distinction for legal or illegal methods unless you don't care.
I recently tested a Strike loan product. I also have a note on how I use an HSA and credit card, but that's indirect si...
Must be careful with the loan terms at least where I live. If do not remain in custody of the collateral during the loan, it's the same as if you sold the coins when taking the loan (cap gains) and buying it back when the contract ends. Ironically, not your keys not your coins.
2