At no time in our country's history has the federal government gone after someone's net worth just because someone has a lot of it. They've seized property for reasons such as bankruptcy and illegal activities, but never from law-abiding citizens. Taxing someone's income is of course legal but not taking someone's money after it has already been taxed.
There are some liberals in our country who would be okay with this. Democrats have done an awesome job of dividing our country over economic status. They've demonized the rich. Not the rich in Hollywood, but the rich people in corporate America. Why is there a difference? Because actors and entertainers are Democrats and they contribute a large sum of money to the Democrat Party; so politicians in the Democrat Party selectively choose which people with money are evil.
The bottom line is where would it end? If we open up Pandora's Box to allow the Federal Government to decide who they think are rich and how much of their wealth they're going to take, then there's absolutely no reason from a legal precedence perspective, that the government couldn't decide if you make more than $75,000 a year that they'll look over your personal income statement and decide if they're going to take some of your money away. They could even force you to sell some of your stocks to get the money, there's nothing that would prevent this from happening.
I find all of this very scary especially since it's being sold by Democrat candidates for the 2020 race in order to create division among the perceived "have's" and "have-not's." Stealing someone's wealth is illegal. We couldn't get away with it in the private sector. We couldn't go into a rich neighborhood and go into houses to steal their stuff. Why in the world should the Federal Government be allowed to do this?