What is the famous saying....."If you can't handle the heat get out of the kitchen."
There are so many people crying about the recent of BTC that I'm frankly getting annoyed. You should know the risk involved in investing in crypto. If not, don't even waste your money. Go buy a CD that won't make more than the rate of inflation. Remember investing is literally legalized gambling. Treat it as such or don't even jump in the pool.
I think these people are just sharing their experiences to which they've lost money. I'm pertaining to those which are really helpful in a sense that they posted it a a manner that's attention grabbing. Also, this community has been effective information pool to which many participants have contributed in by posting small scale movements and even experiences in losing or even gaining profit from crypto.
You're actually on point about all the rants about not losing investments, but in a way it helps the community and other participants in having useful insights about crypto and investment.