CryptoCurrency crash. why is everyone freaking out?

I am trying to buy CryptoCurrency right now because the prices are low but everyone is freaking out because these Currencies are dropping.

I expected this to happen, i mean it works like the stock market right? Buy low, sell high. Did people really expect that bitcoin would keep increasing in price? Always expect a crash, especially in Crypto, but we really don't know what will happen. I dont think the general public even expected bitcoin to be a thing. But now it is and the people that didn't get involved are happy to see it fail. However, i think you should have sold when it peaked at 19k. What do you think? If i'm wrong on anything or if you disagree please share as i would love to learn more. Don't forget to up-vote!