Ultimately, you have to sell the stock to make money. The easy short squeeze has already happened, and there are a handful of hedgefunds that now need to close their positions in the next few business days. At least one has already has done so, so there is less "mandatory" wall street money buoying the price, and that will increasingly dry up over the next few business days. Other funds may have obligations - a lot do, given how heavily shorted gamestop was - but unless they have serious margin problems, those obligations are spread over months. So the influx of WS money is going to slow significantly. And, as short positions close, that frees up those shares to close other short positions.
Essentially, unless you are exceptionally lucky, most of the rich guys who were going to lose money on this have already done so.