The only strategy that worked for me was to hold btc and eth because all other coins gave me loss when i analysed my purchase price in terms of btc or eth, most of the alts are only good if you are looking for usd based profits.
Perhaps you never invested or buy the right token but is there even the right one? Question for me to answer

I always trade in Binance because it's easier for me to convert my profit to fiat and do a successful withdrawal without any glitch.
I have realized one strategy on that exchange, ones a project is good, traders don't love to swing price such kind of projects with price action. What I do sometimes is to buy when it's dip and sell as soon as othera Fomo with update from the project.
This should happen in other exchange too but that's how I do some Altcoins.