Ok it's wrong to say "nothing". But I don't really see consensus nor reliability in crypto currencies. Specially the consensus seems to be missing, if you look this phenomena far enough.
I'm thinking this from the security point of view. Unless you bring the crypto operations outside the battlefield of JS runtime, any js library is basically unsecure.
Bitcoin is really ugly. The utterly ugly algorithm requires storing of enormous amounts of waste data and requires extremely unefficient computational work of "mining". It's just a showcase of human greediness and stupidity.
Creating unscaleable energy wasting ponzi scheme mostly for darknet use is something which I personally call ultimate failure. Maybe not a technical failure, but it is sad chapter in humans history.
Impossible to immigrate to Sweden? They take enormous amounts of immigrants every year. If you just find employer, they will handle the bureaucracy for you. At least you'll get a work permission for certain time and it can be extended if conditions are ok. Consider Finland too.
I don't see much sense using U2F. If you just need a 2nd factor, then TOTP based solutions do it cheaper and easier. FIDO 2.0 is the way to go if FIDO is required.
Second that. Serverless is a buzzword like AI. But the concept is brilliant from many perspectives. It may save architects and developers from db scaling headaches.