I think the red flag there is that people think of what they are going to get from their investments into cryptocurrencies more than the capital they have invested and as results when the reality done on them, they began to sell out of panic and in turn the market clash like it happens through 2018.
Now that we have another opportunity to invest because of the down turned, I do believe that it is good you look at the reality behind any coin you want to invest in and not the FUD, manipulations, FOMO and hype behind those coins.
Well for me, a safe investment would do better. I mean I'm only investing on the top cryptocurrencies that will surely give me huge profits at the near future or when the bulls run again.