Your points are really amazing, the introduction of blockchain which gave birth to cryptocurrencies with Bitcoin been the first and leading coin in the crypto industry has not only yield early adopters profit but makes online transaction simple, secured and very fast compared to the centralized system where transactions takes days before delivery. Bitcoin has serve as source of employment for many youths which has greatly lead to the reduction of crimes round the globe.This year 2019 I have gain a lot from Bitcoin trading which I believed it as well gets to every trader. So I believed its only those who comes in, in 2017 and get it at high rate before it drops and those that fall into wrong hand that will speak bad of this great evolving technoloy.