Thanks. I’d add to your list: assess the fundamental value of the thing you are going to buy.
With bitcoin, as it is not an equity, a debt, or a true currency, you cannot.
So many people should have stopped there.
You were lucky, and you profited. Congrats. Other people have not been and will not be.
Fundamental valuations are critical to investing and trading.
Speculation, which is what buying a cryptocurrency is, does not require it, just luck, like going to the casino, except without all those pesky odds of winning stats out there or the legislative oversight.