The concept of cryptocurrencies is based on trust. If it is fully implemented in all aspects, there is trust within the community and technical solutions applied to provide the security of network, then there will be no need for centralised control.
Got your point. But what about security? I constantly hear about hackers who steel tons of investor's money...
And goverment won't give up its influence easily. USA, Canada and some european countries tend to establish their rules on cryptocurrencies.
Hackers are always everywhere, now depending on the platform they provide, if their platform has strong security, of course it won't be easy to hack into their accounts, but if their security is less secure, it will cause hackers to easily steal all your assets.