When bitcoin became stable, I am sure that many people will start using it and will start investing. SOME countries may also accept bitcoin and will not be banned again.
But i think bitcoin will not be stable not even in the future because it has its own decentralized in nature.I think the current price right now is not going to lasts for a year,it will eventually rise up once a bull run will start or a great news that will cause a big impact on the market price.