Bitcoin is unstoppable. Despite its also volatile, Bitcoin uses different technologies and it makes cryptocurrencies diversified in way you cant kill one because two new grow back!
I really thought bitcoin is invincible. But looking at the increasing complexity of its production and outflow of miners. I don't even know how bitcoin will function without miners. The coin itself and its idea are invincible, but people... no one in the future will pay money for electricity and leave in a minus.