I think part of it is also a “safety net” of sorts for the oligarch buyers. If your corrupt government goes under or if you fall out of favor it’s likely your assets will be seized but it’s much harder for your opponents to seize your condo on the other side of the world.

I don’t think crypto is the answer though. If anything it’s allowing the issue to continue. Vancouver, for example, recently implemented AML requirements for real estate transactions and crypto’s major selling point is allowing users to avoid compliance with that sort of pesky regulation.