Not a pretty place for our children, trust me. I am severely disgusted by some people and activities here, first in line.
I work in internet marketing for years and have seen plenty of scumbags taking down anything for their 5 bucks. Or 5 zillion, does not matter.
I was a bit more positive here at first, but it took only a week or two to see what's this world is made of.
And aside countless good people, I'm afraid that greed and ever worse intentions pretty much negate all positive efforts at most times. Sorry to say.

Thus said, I myself am not so much personally worried about future of cryptos. It's bright, very bright in the long run. It may well be that in 20-30 years from now, our children's children won't even remember paper money like those young people nowdays don't remember MTV, or cassettes, or time before smartphones. What I am worried about is that this de-centralised concept won't be as much decentralised.
It may by worst chance all end up same as offline - 5% having 95% and vice versa.

Because you know, when banks eventually come to point where they can't fight this anymore, guess what happens next
EDIT: so yeah, in that light - don't sell now, don't even sell in 3 months, or in 3 years. Wait 20