Actually, some people wrote books about their investing tactics, such as this one: https://www.amazon.com/Altcoin-Traders-Handbook-Nik-Patel/dp/198617011X

Pretty interesting read, especially since the author does not only focus on technical analysis, like any good ol' trader, but also on fundamental analysis: usefulness of the coin, strength of the community around it, team personality, etc. In short, what makes crypto so interesting for us, much more so than traditional markets. No idea if his technique works, though, but it clearly shows you that investing in crypto is a full-time job if you're serious about it.

Also interesting, especially if you think the market is gonna dive or rise: the good folks at dydx (https://dydx.exchange/) created "short tokens" and "leveraged tokens". It's margin trading with crypto (only ether for now), but I like their idea of rolling up short or long positions into time-limited tokens. Pretty creative, in my opinion. Plus, you have to put quite some tokens as collateral, so this prevents hotheads from doing terrible things.

Full disclaimer: I don't own any of these derivative tokens, and I always sucked at speculating, gambling, betting, etc. As Daniel Jeffries once wrote in a hackernoon article: "Trading with leverage in the cryptos is like juggling Cobras. Don’t fucking do it if you’re not a professional trader."

I take his advice very seriously !