I think so, what happened with 2017 is certainly difficult to repeat so that it only becomes a happy memory in the future, we only hope that the market can improve even though it is not as big as 2017, and of course choosing coins that have good potential in the future is important.
It seems to me that the results of 2017 will be very difficult to achieve. The fact is that 2017 is the result of the entire pr-cryptocurrency campaign until that time. Since there was a lot of information about good earnings using the cryptocurrency market, this accordingly affected the inflow of investments and price increases.
Before 2017 did you ever thought that anytime soon btc can reach to 18 - 20k which it has achieved it. In the same way t can still achieve 25k in future. SO what you say would turn out to be wrong as crypto currency is highly volatile and can swing in either ways.