it takes too long to confirm a transaction with bitcoin. Also the risk of having your bitcoins stolen is high - the reason credit cards exist is because reversi

it takes too long to confirm a transaction with bitcoin. Also the risk of having your bitcoins stolen is high - the reason credit cards exist is because reversible transactions are preferred to using cash. The credit card company acts as an escrow system. I could imagine someone making a credit card that was denominated in bitcoin, but that would be a whole different technology stack than using raw bitcoins.