Someone who can’t handle his coin/money is called a coin fumbler. The friend you are referring to is most likely to seppeku himself.
If you get called a coin fumbler you need to immediatley explain the situation and show everybody involved you are capable of saving money or try to laugh ut off so everybody eventuelle forgets the incident.
Coin Fumbler: “Fuck man i lost my rent money on crypto.”
Friend:”Yeah it’s quiet risky. Happend to me to done that been there.”
Coin Fumbler:”I lost some profit in my Business too… and got towed… and the wheel of my car broke”
Friend:”Oh man your quiet a unlucky guy. You need to stop fumbling your coin you Coin Fumbler.”