If WSB was a hedge fund they just have to buy some of GME - not all or even too much. Other hedge funds could buy some too.
Just have a "dinner conversation" about it.
Just like you and a few hedge funds can get together and collectively short GameStop and other companies... as they are doing now.
There's no rule that I know of that says only one entity can make a specific investment.
-edit-
Don't forget that hedge funds ARE on the other side of this trade. WSB and retail do not have the ability to move this solely on their own. I wonder how long until they're on CNBC/Bloomberg "we saw a great opportunity in the market and executed our position well". If it's market manipulation - was it market manipulation to even have heard about WSB and entered the trade? WSB is a nice scapegoat for the real money that caught these hedge funds in a bad position. Didn't take long before WSB became alt-right, white supremacist, market manipulators... etc.
It isn't. Hedge fund managers have "idea dinners" with dozens of their friends all the time to discuss what plays they are thinking... they frequently also bring in guests that represent companies, or even politicians/former politicians to discuss lobbying strategies to keep this exact type of collusion and market manipulation legal for them.
But as soon as a bunch of the dreaded "retail investors" start doing it in the open, Wall Street calls on K Street to save them.
That's amazing. So they basically found a legal protocol to do things that would otherwise be illegal, and institutions like judges and the SEC just let that happen?
Just have a "dinner conversation" about it.
Just like you and a few hedge funds can get together and collectively short GameStop and other companies... as they are doing now.
There's no rule that I know of that says only one entity can make a specific investment.
-edit-
Don't forget that hedge funds ARE on the other side of this trade. WSB and retail do not have the ability to move this solely on their own. I wonder how long until they're on CNBC/Bloomberg "we saw a great opportunity in the market and executed our position well". If it's market manipulation - was it market manipulation to even have heard about WSB and entered the trade? WSB is a nice scapegoat for the real money that caught these hedge funds in a bad position. Didn't take long before WSB became alt-right, white supremacist, market manipulators... etc.