I remember hearing something about a bitcoin credit card. Like, one that you pay for everything with fiat on credit, and then you pay off your bill in bitcoin. So you never have to hold fiat if you don't want to.
What's the best/most reliable credit card that does this?
I think bitcoin credit card is a nice idea to all bitcoin users because you can withdraw your money instantly and easily. But, some bank in the world didnt accept bitcoin so that I guess credit card would be a debit card that you can use in paying your bills and shopping in online market. I guess in the near future there will be a credit card that can use of all bitcoin users.
The thing is that the OP wants a legit credit card - one that you can take out loans from.
This is probably not going to happen with any bitcoin implementation because bitcoin is irreversible and credit cards are not. So a person can get cash advances easily, using perhaps stolen credentials. There is no way the credit card company can do anything about it. They can't reverse it because bitcoin blockchain is not reversible.
Also you have to consider that people using stolen docs to open accounts is going to be a huge problem. How will the company issuing these cards ensure that everyone is legit and will pay their dues? There is nothing preventing them from using fake ID cards etc. to open an account and scam. That's why bitcoin debit cards are popular but no credit cards out there.