Robinhood, Reddit, Gamestop In Simple Words?

I think this incident is a massive wake-up call for the entire industry.

I came to know about Viacom in early 2020 and bought for dead cheap price. I was hoping to hold this for long time due its dividend, but by fluke I got pulled out when it hit 100$. Whole last year I was in a assumption that price spike was due its contract with NFL and its other brands, launches.