After I posted about Coinbase, it occurred to me that OP (Kiki112) doesn't have or doesn't want to disclose a bank account, and I'm not sure Coinbase would approve an account with only a credit card.  Since anhpt192 and EnderHf expressed surprise, I should add that I have not successfully used my Visa card with Coinbase, only bank account.  First, I found that almost all of my true credit cards (it rejected my debit cards) were MasterCard (not accepted at this time), a pattern I hadn't noticed before.  And with my Wells Fargo VISA card, it refused it, said it didn't authenticate.  Huh?  I emailed their customer support that I had checked EXACTLY the syntax, spacing, etc. for all fields right off the Visa bill, and they didn't respond.

Otherwise, I've found Coinbase, while slow to process via bank account, to be a smooth BTC purchase source -- and next time I need a new credit card, I'll look for a VISA to get more diversified!