Do most millionaires/billionaires manage their own money and investments or do they have financial advisors and shit?
Pic somewhat related: He probably makes all his own investment decisions
They hire different people to do different things.
One or more accountants, financial planners, etc.
It's not really possible to manager your money yourself when you own multiple large businesses dealing with millions of revenue/expenses each.
>>1023805
>or do they have financial advisers and shit?
Yes. And I'm sure multiple advisers as they don't want to have all their eggs in one basket.