https://drive.google.com/file/d/1VkyFgmHXmijKrGmElKc3Y3SF18gU81GF/view?usp=sharing

This is what I see in my W777 account. They do allow Crypto deposits and withdrawals but only support USDT now. Maybe other Cryptocurrencies will be supported down the road.
Regarding creditability, I have not encountered any problem so far. Maybe I have not won enough money to test that out haha.