Moral: I think BTC and ETHEREUM is better option for investment, Can be trusted blindly, profitable for long. Low Ranked Altcoins, Memecoins and shitcoins are just headache and reason of huge losses in long time. But anyone can invest his money wherever they want.
Earlier the better for anyone who's into cryptocurrency business to have the knowledge that it pays better in the long run to invest funds in Bitcoin, and if there's need to diversify into other crypto coins, then the first choice should be none other than Ethereum. Like you've learned from experience that all that glitters is not gold, new altcoins, can come with sweet promises of giving you multiple ROI, but in the end some are scam projects, some wouldn't withstand the tide of volatility, while some actually leave up to expectations. The question now lies in being able to know the ones that'll be profitable and stand the test of time. By my estimation it'll come down to gambling to determine the one to put money into.
If I were to invest in new alcoins, I'll put an amount that I can afford to loose, so anyhow it turns out, it'd be like winning or losing in gambling, accept the outcome good or bad and move on. I can only put the money that I can afford to invest in Bitcoin, and a step further will be Ethereum.