Do you think if BTC had a stable price which could only be altered by $0.01-0.10 it would still be as popular and as used?
I think no, because bitcoin become popular because of its value was changed every hours. If it is stable it is regular salary like the other job, so its not unique. Being unstable of it is their asset.
The main reason behind seeing this much increase in the number of investors who are investing in bitcoin is none other than the increasing price of bitcoin and that too on daily basis. I think this will be really hard for bitcoin to maintain its reputation when the market price of bitcoin will get stable. This will bring really a bad name to bitcoin and it will soon lose its popularity then.