Hi @surfyogi ! Thanks for mentioning my post!

A few things that occured to me:
The concept of crypto currency: absolutely agree it is here to stay! Ultra portability, worldwide transfers and all that good stuff, ...great! Agree it is here to stay! Like it was clear that the internet itself was there to stay in that bubble.
But the area I see little critical thinking is that of the valuations (like the internet bubble) they seem to be totally separate from the actual technical performance of most of them.
3 transactions per second is not going to cut it for a workdwide payment method.
Aside from the security challenges... first of all holding crypto requires a lot of effort to do so securely, and then the code of smart contracts itself seems vulnerable too (see the John McAfee video below, eyeopening...)

Like you say there will need to be a few technological generations before it gets to a useable state. Maybe the biggest cryptocurrency is not even invented yet... like google, youtube and facebook came all way after the bubble burst.
Regarding the legal aspects... dunno but it seems like many people doing ICO's are living in lala land plugging their ears and humming pretending that because it says "decentralised" they are immune from the law... a scam is a scam: some of them openly admit they are pumping and dumping for godsake... some dragnet will eventually come down and all kinds of projects will get scooped up...good and bad.
Smart contracts are still only a glimmer of an idea mostly and to pretend that they can live in a sterile, lawless vacuum seems a bit silly. Like any contract, when things go wrong they will end up in court... and go wrong they will occasionally.

All in all, great promise this cryptocurrency stuff but when will reality catch up to the promise? Look at VR, where is that holodeck they promised we'd have by now....?
In the meantime there seems to be a huge gap filled with speculation and lots of people trying to convince themselves and others that it will all keep going up.
Admittedly valuations can still increase enormously for a while since the general public has not even really got into it. The question is will they be allowed to join this circus before some legal intervention shuts it down?