The main thing is that the novice trader should not buy cryptocurrency for credit money, so that he won't bite his elbows in the event of another market crash.

Oh, yeah, trading and/or investing in credit funds is the height of stupidity. The first rule of the investor is to buy assets only for free funds, on which the quality of life does not depend.
Although many of us know this rule, still, a lot of people withdraw money from a credit card and start trading them, because its impossible to save money from their main income for the trade deposit.