I think if you (UK) or I (AUS) went to a bank today and told them we have Bitcoin and want a mortgage we’d get laughed out of the room.
There are products emerging, albeit they use private capital and they DGAF about mixed coins. You’ll be paying 10-12% interest, but they’re not going to analyse source.
Those companies will be the beachhead. The banks will come and when they do they won’t get to be picky due to distribution constraints. If they’re forced to, expect them to have a loopholes division..
One other thing to note. You and I are very familiar with the constrained tradfi systems of our countries - it’s not necessarily like that in all 200+ countries around the world..