Where funds sit, what an exchange can and cannot do with them, and the handful of habits that account for most losses that are not trading losses.
Nothing matches that. Try a shorter word.
Advice about crypto fraud is written for people buying their first coin, which is why it does not protect anybody else. The schemes that reach traders with years of experience do not rely on ignorance. They rely on routine, on timing, and on the fact that an active account signs things all day long.
The debate about self-custody is usually conducted between people who disagree about what a key is. It is not a container, nothing is stored in it, and a wallet holds no coins. Getting that right changes the question from an ideological one to a practical one: which failure would you rather be exposed to.