No knowledge of the financial stuff, but maybe: put most of it in a variety of ETFs, hire a financial advisor and an accountant to help you navigate the system and the taxes, then cash out and donate it.
You spend it without giving it away. Then you give it away. Some countries give you a lot of it back at tax time if you donate to registered charities so you'll even get something for it. I dunno, I'm a poor so maybe it wouldn't work out, but it would be cool.