The only way I'd support something like this is if they limited it to taxing investments when they are used. If a person holds onto an inflated asset they shouldn't be penalized. If they use that asset as collateral for a loan then I think it's fair game.

That said, I'd like to see an analysis of what the financial system would look like if we applied that sort of logic to all asset classes and included various entities like corporations, trusts, etc., before I'm fully sold on it.

I really appreciate the desire to reign in the massive wealth inequality in the world today. I'm just wary of these sorts of 'hackish' approaches. I think of the law like I think of source code. It should be clear, consistent, analyzable, and come with a clear set of testable goals and intentions.