[isthatafact]

My guess is that the very rich can instead figure out a way to avoid it mostly, but I like the idea of taxing ridiculously high wealth, even if it is difficult.

However, a tax an unrealized gains would seem to greatly reduce or maybe kill the chance for the poor or middle class to use investments to save enough to retire early. That seems very unfair. I do not understand why such a tax should apply to anyone not well into the upper middle class range of wealth.

And trying to make clever calculated bets on individual stocks now has risk of having to sell everything and still not having enough to pay the taxes, if they were assessed during a temporary spike in price. Even holding an index fund during a market crash could mean ending up with nothing because of the tax on fictional gains.