Contrary take
What if you do not want to sell your bitcoin but still need some fiat? I would say that borrowing against your bitcoin is a solution but:
1. keep in mind volatile nature of bitcoin
2. plan for 90% drawdown
3. do not hurry, do not be greedy
4. maybe borrowing 10% of collateral bitcoin is fine?
5. go to 1 and think again - what would you do if it was 91% drawdown
6. choose lender carefully - this is additional risk
Anyway, borrowing 100% value of collateral is reckless and will always be punished but I do not straight dismiss borrowing at all. Some day a day might come.