In such a market, any cryptocurrency from the top 100 is a good investment, because the market has fallen too much down.
It's true that your opinion is that all crypto currencies are good for investment and the main one is in the top 100, and that must also be the right strategy if you invest in the crypto currency
Investing to cryptocurrency is high risk investment because of its volatility but if you are disciplined enough and no what you are doing, you can potentially earn big as like any other people do.