A significant part of the top 20 cmc coins are bullshit too. Market cap doesn't mean anything significant to me at all.

What I would not risk unless a coin has some impressive and amazing features is investing my money in coins with low exchange liquidity and volume. If you don't plan to literally gamble your money and see your portfolio change by 50% in a day, don't put your koney in them.

I'd personally not risk especially during these times. You may need money urgently at some point.