For the first time I see such a crazy project. If he succeeds, then I am sure that soon they will begin to distribute the land and the air also with the help of a blockchain.
Your concern is understandable. In fact, blockchain here is a necessity to eleminate your safety risk. Water is the most sensetive product on the matter of fakes. We implement blockchain for protection our consumers. There is no market for natural water in some countries, but lottery with treated / natural water in branded bottles. Only blockchain sets the firewall between natural and treated water in the same looking bottles.