You might think that, but 99% of Bitcoin holders just see it as an investment instrument.
There is no way to measure that, so that number is purely your guess.
As a payment system, Bitcoin is terrible, costing up to $30 per transaction and taking up to 30 minutes. That's insane compared to an ordinary credit card transaction. That's why almost nobody uses it that way.
FYI credit card transactions take months to become finalized. Bitcoin's transactions take on average 10 minutes to become finalized (aka irreversible).
As for the cost, nobody ever claimed that Bitcoin is a "perfect" payment system. It has its shortcomings but it still is a payment system that works. The only decentralized payment system in fact. That's not to mention that credit card fees are percentage wise so unless you are paying for peanuts, it is going to cost a lot more than a bitcoin transaction that with current fee rates barely surpasses half a dollar.
And Bitcoin isn't even private, and using Bitcoin for a payment is much more dangerous than using a credit card since your transaction is publicly viewable forever.
Only if you live in a dictatorship without certain fundamental rights
