They can probably see the writing in the wall. BTC is now 17k and touched 16k still massively overvalued for the actual real world usage of it. When Binance and Bitfinex go stocks like this will implode and mining is simply not going to be profitable. This stock is IMO highly likely to go to 0.
I do remember someone on this forum managed to sell right at the top of the insane argo rally, but can’t find the post now, best time to sell was March 2021.