I want to buy bitcoin through my bank debit or credit card. So which site is the best and secure to buy bitcoin through debit or credit card.
You can try
localbitcoin.com. It will support lot of FIAT payments for the bitcoin trade.You have to start a trade with the buyer of desired FIAT advertisement.This one had two factor authentication,which provide safety to your bitcoin in Localbitcoin wallet.You will get quick response from the seller.