That's what one of the biggest mistakes people have made when they engaged into cryptocurrency investments. They think that it can make them rich real fast but when the market falls down hard after that 2017, they start complaining and whining now.
Those are individuals who really don't know what crypto is all about. They joined the bandwagon without sufficient knowledge that crypto is a very high risk investment and the price is very volatile. But if you are in crypto long enough before the 2017 hype, you would know what your next steps will be during this bearish market.
That is somewhat ridiculous to see them keep whining, let them think negatives against crypto.
This is the result of too much speculating the market, as they always thinking that prices will keep climbing without even realizing that falls may also happen. They don't have knowledge about this form of investment and so they'll never realize it.