For me bitcoin is good for economy as long as it will use correctly. I mean ,it will not be use in evil works like drugs, crimes, scam,etc... Bitcoin is very useful if we give value on it not just as an investment but more than to that.
It's not just Bitcoin that has that use it correctly and it will serve you, use wrong and it can hurt you. Only thing is that
it's not on individual level, it works for all of us, and it can be good for all of us, or it can be bad for many of us, and how
will it be will depend on how we use it.
And I agree with you Axelseseclevz, if we use crypto-currencies in the right way it can be good for the entire world and
all the people who live!