Hard to say. On the one hand, part of me thinks it'd be best to spend it on marketing, since you could get a lot of attention for future projects if you could lock in say, a few decades worth of ad space on major publications and social networking sites.

Also:

* Obviously buy a ton of stock and crypto.

* Use it as an incentive for people to follow you on social media, join your site/SaaS service, etc. We've all seem those folks claiming to offer $1000 to whoever follows them on Twitter, a legit version with a few hundred thousand dollars per person would rake in followers like crazy.

* Transfer as much of it to other people as possible, on the assumption at least a few of them will pay at least some of it back.

* Put money in various online gambling sites, since hey, whatever I actually make in winnings is my cash.

* Go on a general spending spree, since 30 minutes is still plenty of time to buy whatever random consumer good or piece of entertainment media you'd ever want.

* Pay people to work on things I want done on an 'all money up front' basis. If they turn out to be scammers, that's not my problem.