It looks like you've covered everything ^{[#2 is very important and from time to time, even veteran traders fail in doing/achieving it]}.

That's not always the case and depending on how long you'll be hodling ^{[long-term/short-term]} and the time you'll be cashing out, results may vary.
^{- IMO, hodling is the safest option but that doesn't automatically equate to having more profits.}

For the most part, you're right but if someone purchased BTCitcoin in Dec of 2017 and sold everything ^{[after hodling for a few years]} on the period I highlighted in 2020, then he/she would be selling those at a loss.