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!
Even though the current market performance of Bitcoin and other Crypto currencies looks like being manipulated to go down or to slow the earning process still i believed that this is just a temporary price rise up delay that Crypto currencies are really unstoppable as long there are people that will always to invest, to hold and will fully support the investments then i could say that stopping it is very impossible.