Very little here seems reasonable, besides eventually decentralization of power sources because the centralization of power sourcing is becoming increasingly incapable of providing power. Banking on communications used by space aliens simply has no evidentiary basis whatsoever, and I'll simply point out this final misstatement to finish my criticism.
"...cryptographics solves theft problems."
Not that I've seen. A constant stream of thefts of cryptocurrencies is reported today, and the theoretical prevention of theft cryptography supposedly facilitates has not prevented actual thefts of cryptocurrencies.
Thanks!