reddit post this week. someone buying an apartment in portugal, debating selling 1 btc vs borrowing against 2.2 at 1.24%. on paper, the loan feels safe. in practice, it only feels safe if you never map the liquidation path.bitcoin backed loans are a volatility bet. the lender doesnt care about your conviction. they care about the collateral ratio. if btc drops fast, you get a margin call. if you cant top up, they sell your btc at the worst possible time and you still owe the rest of the loan.the clean rule is simple. only borrow what you could repay in cash even if btc fell 50%. anything beyond that is a margin position. that can work, but call it what it is. you are long btc and short volatility at the same time.if you still choose the loan, size it like a trade, not like a mortgage. if you cant sleep with a forced sale, dont build a life purchase on it.