Don't. Tell. A soul. I can't deposit the money for obvious reasons, so there isn't much I can do. I could try money laundering.

Assuming it goes straight to a bank, and my security isn't an issue, I'm giving away 300m away to charity, environmental research, and family. I'll get someone to help me invest my money, because I know nothing, and use it to kick start a business or YouTube channel.

Sorry, can't really tell you 5 specific purchases I'd make with it.