Buying up houses to rent creates more housing.
We have plenty of homes but we built the wrong type.
https://youtu.be/VfYp9qkUnt4
People will still buy houses to rent even in a Bitcoin world because people still want passive income methods.
If anything Bitcoin would accelerate homes being made for rent because then they could utilize the house to get more Bitcoin.
But yes, I will say Fed policy did manipulate the market to make the practice more common than it naturally would've been.