How to become a cryptocurrency millionaire: start off as a crypto currency billionaire and buy a bunch of useless land in the desert.
It never ceases to amaze me how dismissive people are of desert land.
This particular land is covered with vegetation, it's not even some barren landscape of endless sand dunes. All he'd need to do is drill wells and build out some PV arrays and it'd already be a place people could easily/affordably build relatively comfortable, albeit simple, lives. Hardly useless.
I'd certainly prefer acres of such desert land over bitcoin of equal value.