No I do not think it would be so popular as now because its also the power of the bitcoin itself right now so it has two sides.
Its good for the bitcoin that its going up and down but a stable price would also be nice in my eyes.
of course it wouldnt be that popular i think, the price of the bitcoins would be way smaller because less investors would get in
Yes it will still popular since it has unique characteristics when dealing in an online transaction compare to usual fiat transactions.
And yes the price will not be on much higher since it will be used more as a currency.
I do not agree with that. If bitcoin is used as a major currency, the price could be in the thousands easily.