Question, out of curiosity - How do founders manage those troves of cash after selling their startups for billions (sometimes even in cash)? I'm aware the amoun

Question, out of curiosity - How do founders manage those troves of cash after selling their startups for billions (sometimes even in cash)? I'm aware the amount is a mix of cash and stocks paid over 3,4 years. But, in some transactions the cash portion is not less than ~$300M.