This thread was created in the wrong section. This should be in the Economics sections. Anyhow, to answer you question: A stable price would most likely end up attracting even more people to Bitcoin. One of the major 'cons' that it currently has (for people who consider joining) is that it is very volatile and that you might end up having much less money (e.g. in USD) the day after you've bought some Bitcoin.
that's true, lots of people get attracted in joining bitcoin because of the good opportunity if we talk about bitcoin price. that's why some celebrities even billionaires are investing of bitcoin because they know that they can get huge amount of profit in return. their are also some countries that bitcoin is already acknowledging by their government. I guess if bitcoin have stable price, i think this could not affect totally the popularity of bitcoin, specially now that bitcoin price is so high. maybe if their going to set a price of bitcoin, i think it would not the same as what bitcoin price 8 years ago.