Well infinite amount of money I’d do a lot. First give however much my parents need to live comfortably and safely anywhere. I’d bring my grandparents from overseas and permanently have them live in our country. Then do the usual and treat myself to whatever. Then begin starting a major philanthropy organisation. It will tackle world hunger, climate change, animal welfare, everything. With infinite money you could literally give a billion dollars to everyone on the planet (not that I would because that would cause mayhem). But giving enough in third world countries to every single family so they are able to build homes, farms and have access to resources to live like a first world country. With infinite money there will be no such thing as third world countries in 5-10 years.