I personally think it would be even more popular, since people would be able to convert fiat to Bitcoin and hold them without having to worry about it losing value.
It would be used more as a real payment method than it is now.
The only reason why bitcoin is so popular is because of the price. It changes its price randomly. So if the price of bitcoin is on stable pricenof 500$ for example, would it still be popular compared today ? Thats actually the most special thing about bitcoin ..
I disagree with you. Price is of course important, but bitcoin offers us a world without borders. You don't need to worry about paying taxes and fees. In addition, in any country where there is Internet you can use your money
I strongly suspect that a lot of people are going to disagree with you too
Especially, in respect to fees and more so in respect to those fees which you pay for transferring bitcoins from your wallet to someone else's. Apart from that, the use you are talking about (that of a global currency, or a means of payment) is basically irrelevant since most of Bitcoin value (whether you like or not) comes from speculation nowadays anyway