Otherside
From what I gather, although I'm not an expert in shares -
Wall Street bet that businesses such as Gamestop would go bust/shares would decrease in price -something called short selling. Doing it will drive the share prices right down. Reddit noticed it, came in and bought shares using Robinhood. Share prices rose above 1000% of what they were before because they were being bought, Wall Street lost a lot of money. Robinhood limited how many shares people could buy.
Good for reddit, Wall Street deserved it. The London version of Wall Street does the exact same thing. Short selling ended up driving a lot of companies into the ground during 2008 that otherwise could have survived. They're doing the same thing during the pandemic. Drive share prices down to the point a company goes bust, a few people become even more richer than they were before, and someone watches there business go bust with all the job losses that follow.