I would love to see unrealized gains used as collateral taxed.

I’ve always thought it was the fairest way to stop them from using/enjoying/benefiting from their wealth without paying taxes, without having to just outright tax unrealized gains which is pretty unfair to me.

You could optionally start it at a certain wealth level so as to not burden the working class with the extra complicated taxes it would cause, and the wealthy at that point would be able to afford the extra work on the taxes.

I sadly don’t think it will ever happen in our life times =(