The hyped in 2017 cause bitcoin and others cryptocurrencies to surged toward the end of the year and complete crashed back to the bottom in December 2018. Did people really know what they are investing in?  Is a question that keeps ringing in my mind and actually the answer to that question is that people follow the hype and forgot to  checked for reality before investing and this come from the testimony of those that has claim of making big profits or gain from the past surge that came into the cryptocurrencies market.
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.