Earlier quoted context omitted.
This is also, IMO, part of the problem. As you “move up” more and more undiversified wealth is tied up in your illiquid “investment” leading to overly protectionist policies. Imagine if 70% of Americans invested their wealth in, I dunno, IBM. Don’t you think that’s going to incentivize some crony policies?
A house/property isn't as illiquid as you think. You can take out loans against it and invest those, often at below or near inflation rates and very often below average market returns. The equity in a home is collateral for more property, investments, etc. I can't sell it on the stock market in an instant, but I can use the equity in my properties for a ton of things.
Now imagine we make a rule that you can’t exit that position. But you can borrow against your unrealized gains. That obliviously incentivizes even more protectionist policy.
Just like with housing, you can rarely fully exit the market because you’ve got to live somewhere. But when people have most of their wealth tied up in a single asset that also acts as a revolving line of credit, it tends to overly inflate the value of that asset. It just makes people protect those unrealized gains that much more or risk being upside down on an asset you can’t sell.