|You're walking down the street and $20 is laying in front of you and you pick it up. This is "found money."
You play the lottery and win $1,000. This is "found money."
You get contacted by a relative and they tell you you have money in a bank account that's yours. This is "found money."
You're at the casino and have won $500.
The key point to "found money" is that you treat it differently than the money you earn. If you lose this found money you don't feel as bad as if someone stole it from you.
Is this why such a high percentage of lottery winners eventually go broke?
Treat "found money" as real money and spend it, invest in the same way you would other money.