A friend of mine embarked on trading without a proper mentorship and lost all his assets.
Your friend cannot loss his assets if he traded on spot, he might have crossed the line of beginners stage to margin trading, futures and contracts, if he was clam enough to buy assets in spot while the price decreases, it's still a good step but he fails to do that.
I totally agree on this, what you just described are supposed to be like a big noticed pasted on his mind as a newbie and in context whereby trading is not guided properly it’s causes huge damage to the finance.
Trading is a risky business where there shouldn’t be any expectations.