He also felt social media had got a "bad rap" and his treasure hunt showed it could be used for good.
Dunedin's treasure hunt was his second. The first was in Tauranga, and he would probably be back to hold another one after last week's success.
Louis, who had his final year at Bayfield High School last year, said he was shocked when he found the cash because there were hundreds of others out looking on Friday.
He thought the treasure hunt was a great idea.
"It's not just about people trying to find money, but it's also getting families out and about and being active.''
He was not sure yet how he would spend the money.