By listening to someone who knows how to manage money? Or by letting someone handle it it who fucks them? If you’re talking about a professional who is licensed and bonded and all of that seems like it would be smart…

No, they end up broke because they spend as if they'll never run out of money without putting it into places that continue to make money for them. They level up their house, car, clothes, flight class, whatever, then end up living paycheck to paycheck with no savings and not being able to keep it up forever.

Are there cases of some wealthy person trusting the wrong guy, whom they hand over their $$ to and that person runs off with it? Sure, but that's a far cry from getting advice from a professional and following their advice.