I would love for them or anyone to do this. They hoard those coins, there will be even less and will drive the price of bitcoin up. In traditional stocks, most (over 90%?) of the owners keep them on exchanges and they can be lent to shorters who drive the price down. Bitcoin owners (majority) don't keep them in exchanges, but in their own wallets (i.e. electrum, tezos, etc.).
Let's say there are 10 exchanges and they each have 1M bitcoin each (which is highly unlikely). Each exchange supply of bitcoin is different and cannot be commingled (due to the private keys) which is why there's always price differences between exchanges.
There are 16M bitcoins in circulation but the estimate is 20-30 percent are lost forever due to the private keys being "gone" (i.e. lost hard drives, dead owners who didn't get to pass the keys, Satoshi's ~1.1M coins, etc.). How many millions in the world want to own 1 bitcoin (which is a nice round number even as we always say you can own a fraction as it's divisible)? From Japan, from South Korea, from the US, and from the rest of the world? The majority of them have been taught "they're not your coins if you don't have the private keys" which is another way of saying, you have to keep the bitcoin in your own wallet as you are the bank. tl;dr, but I just see the supply keep shrinking at these exchanges, and again, no one can print them, so if these institutional investors actually buy bitcoin and hold them in secure "safes" to prevent an exchange from disappearing with them, and hedging with futures, it still boggles my mind how many bitcoin will actually be available at exchanges and this becomes a cycle as more people fomo and buy bitcoin and withdraw to their wallets.