You should transfer the crypto to bitcoin first by exchanging them on an exchanher. Then you transfer the converted BTC to your local wallet and trade your BTC for the Fiat currency. That is the best thing to do and very cheaper as compared to other costly method. Using the crypto debit card would be bad idea as they charge as much as 5% per transaction which is way higher than the normal debit card. Better go with the first way I mentioned. If your local wallet allows you to convert other crypto currencies too then you can always avoid converting to bitcoin and thus it will save your charges and time as well. Good luck. :-)