Yes it will be still popular, Many users got into bitcoin because it is not tied with the users identity and its low fees . As long as these two will not change people will still come for bitcoin .
But the thing that worries me is most bitcoin users have become one because it is a good long term investment , So its popularity might not be as fast as it is now .
If bitcoin alone would have a stable price, then bitcoin users would just have to use a different crypto-currency instead. The art of playing with the price fluctuations is one of the reasons why people invest in bitcoins. If it's not volatile anymore, then bitcoin is not that profitable anymore. I wonder what would be the price of 1 bitcoin though. If it's worth millions, I'm sure we, the first ones to be here, would be rich and would just need to convert our bitcoins to become a millionaire in fiat.