Yes it would be still popular. Some people needs to hide their money from the government or they don't want to pay taxes, and bitcoin is the alternative for that.
If bitcoin had a stable price it would be just like a bank for me.
Some stupid people will be like hmm
Ive been afraid if using this for a longtime, and now is the perfect time to get in. Smart people that have been using it all this while will be like uhm
this doesnt make much sense anymore. Anyway, I will still stick to it.