Biggest argument people are going to have against this is reading the headline and then realizing most their retirement is in the form of unrealized gains. But if you then just read the qualifier of $100 million, you will quickly realize we are not talking about normal people here. We aren’t even talking about normal rich people. We are talking about the 1% of 1% people.
You would be surprised. If you worked a decent job early in life, moved up the ladder, retired as upper middle class making $250k-ish, it is kind of expected to have about 2-3 mil in your retirement. Hell, if you work a half way decent government job and invested wisely your entire life and didn’t have stupid amounts of debt, you should have about a mil in retirement.
1 mil in retirement gives you about 5,500 per month at a growth rate of 6%, withdraw rate of 3%, and annual inflation at 3%. The current recommended retirement is a little under a mil.
As far as retirement funds counting as tradable assets, that is how your 401k accounts work. It is literally a stock market account. The question comes down to when the tax is paid, pre or post withdrawal. In a roth IRA you pay the tax coming in. In a traditional IRA you pay tax when the money comes out. Either way, as long as the money stays in the account you can make it liquid, put it in a stock, bond, mutual fund, whatever you want as long as the account can do it; but in the end it is in a trading account and short of the cash in there, it is a tradable asset.