Totally agree with you
The only thing I want to emphasize is number 3
3.HODL Only Altcoins With Real Use Case
There's no better tip than this one, people and devs write some beautiful whitepaper, launch a coin and try to sell to another people, but they can't asnwer the simple question: What problem you coin will solve?
They only want to lauch a coin, not solve anything, so it's not valuable in a future
its a common secret. crypto just for gain profit, its good as long as they can put their coin on exchanger.
point number 1 is good for long term. they must have stable income, or montly income to fill their need. usualy, richest will play long term. or you can day trading with some capital.