Great conclusion to your series! Blockchain and cryptocurrency have a lot of potential value that they have yet to reach; albeit with a lot of mistakes and pitfalls along the way. Just like with innovation of things in general, some people will probably lose jobs but new jobs will get created (we don't have to wash clothes by hand anymore, or pay someone to do that, but now there are washing machine manufacturing/repair jobs, to use a random example)

This being a new frontier, it'll be interesting to see which cryptos stay and which ones fall, although naturally I like to think that the ones I picked would stick around much longer... But it's unfortunate and annoying that many purely consider this a get quick rich scheme, and say launch ICO's for unfinished coins that they don't intend to really push forward.

What comes next? Maybe greater adoption of crypto, first in specialized capacities like logistics tracking as it gradually becomes more mainstream, and maybe it'll upend say current systems of tracking medical records or taxes; but this is more about how the blockchain can revolutionize things as opposed to cryptocurrency, I think the distinction can be forgotten sometimes

I guess a passing concern of mine is if say quantum computing makes huge breakthroughs, such as if it can reliably and quickly break encryption, but that would overturn the whole concept of a secure Internet as we know it anyway, maybe some sort of cryptocurrency will be the solution anyway