Without UBI there's going to be chaos. Trump may be controversial and rather colorful a figure but whoever may be next could be make Trump look boring in comparison.

Cryptocurrencies can help but they will not be able to plug the gap. It comes down to resources. What resources do the people who are made redundant, many permanently, have to bring to the table? Very few can become software developers or anything like it. (At some point, that may actually prove a bottleneck unless the productivity of the rank and file of developers can be improved significantly or if AI will become sufficiently advanced to do the programming by itself.)

One commentator against UBI on the grounds of not so much eschewing it because of the way it fosters dependency on a central entity but because of libertarian leaning moral reasons, suggested that that if made permanently redundant by AI and automation, she'd "live off the land". Good luck with that. First of all, most land is privately owned and landowners aren't going to tolerate people setting up camps without permission. Secondly and most importantly, very few people have the skills to survive out there. Certainly not tens of millions of people in the coming decade. This goes to demonstrate that our value systems and many of the moral truths we consider self-evident are bound to become completely unworkable in the face of accelerating technological change.