There are a few platforms that allow thats:
- Blockfi.com
- Nexo.io
- Coinloan.io
Obviously though, you can't just take a loan, you will have to lock some other crypto assets you have.
Alternatively, you take a look at the lending board on the forums (if you're willing to provide a collateral).
Aside from these, there's also crypto.com that offers loan. Yes, they wouldn't just give out loans without any collateral so be mindful of that OP. And another thing, I guess you're already aware of it that the collateral given is usually higher the value than the loanable amount.
https://crypto.com/en/credit.htmlWas about to write the same.
It happened to me once - I used their loan service and it was decent. And yes, collateral I gave was higher than the btc I loaned