At the time my 3000 BNB was worth about $3000, yes today Id be a millionaire living offshore with my yacht.
Lesson learned, a huge lesson at that. I dont invest into ICO's anymore and I just stick with the top 20 if I wanna trade.
There were investors that have been lucky with ICOs but it's true that they're not all profitable. That's what everyone should have done at that moment when you're able to make a lot of money from these ICOs, to reinvest it to a top coin or no other than Bitcoin or just kept it through stablecoins.
The best time to invest into ALT coins is when bitcoin doubles the previous ATH and stays there for a while. ALT's flourish.
Other than that I dont really do much but analyze the market.
You're right, that's how I also sees the market on when it's best to invest in alts. I mean it's best to invest before any pump or ATH happens. But that's the sign when alts are going to reach ATHs, that's when Bitcoin goes up already first.