Don’t they have those fake $20 bills that when you see on the ground and pick up, they have a message in them? I’d buy about 20 of them that said Go Woke, Go Broke.
If you’re looking for a charity to support, check out Code of Vets. $.98 of every dollar goes to vets in need.
You can buy motion picture prop money:
https://www.ebay.com/sch/i.html?_nkw=motion+picture+prop+money
Write your message on a sharpie.
(I am not a lawyer. Perhaps it is illegal to put fake money into a red kettle.)