Which is also why all those company market caps you see quoted everywhere are totally ridiculous. A company is not worth the latest price of a small share transaction multiplied by all the outstanding shares.
There's enough depth in the stock market to make company market caps pretty real. If you had a big chunk of a company, you could sell it for close to the trading price. I'd be shocked if you couldn't get half, as a nice round example number.
I would not be shocked if trying to sell $200B in bitcoin gets you far less than half.
