Assume that you believe that liars (aka politicians) are telling the truth if you want. This proposal to tax unrealized capital gains is a disaster waiting to happen.
If you legitimately get a boner at the idea of making Bezos' and Musk's life a little harder, this is still a problem.
The bill was currently written wouldn't effect hedge funds or corporations.
So, say you started a video game development company that took off. Say that the value of your stocks in the company doubled every year for three years. You still hold the majority of the stock in the company because you created it and you want to be the person continuing to drive the company.
With the current capital gains tax, you don't owe anything to the government until you sell.
With the current proposal, if your stock in the company goes from being worth a million dollars to $1.5 billion in a year or two, which can happen, you might be on the hook for a tax bill that you would only be able to pay by selling your stock in the company to hedge funds or a company like Sony.
This proposal is the ultimate dumb idea and it would kill the economy.