Years ago I worked with a CPA I nicknamed "Beer Bottle Bob" after he told me his story. He lived in a rural area on a dead end road with a road house at the end of it. If you remember, back in The Day, beer bottles were sold with deposits. Bob started to pick up the empty bottles tossed out of cars by patrons on their way to the resort. Then he began to find full bottles people had stashed but failed to retrieve. He sold these back to the store when he turned in the empties.
One day his dad discovered that Bob had quite a tidy stash of cash for a kid his age. The old man didn't know a lot about high finance, but he knew that money could go to work just like he did. So he invested Bob's money in GM stock.
The years went by and Bob kept at it and the GM stock grew and when he graduated from high school, he had the money to go to college. The first member of his family. Then he paid for his sister's education.
I always pick up cans and bottles on my daily dog walk. California CRV. I haven't made enough to pay for college, but it cleans up the neighborhood and it's found money.
Good luck to all,
The Old Bookaroo