That's very interesting, but we can state they still have to go to shore to get some real food...
Without that they cant be possible living in that place for long time without leaving and getting some supplies from the "outside".
Im glad for them and everyone else who thinks that way into using Crypto / bitcoin's to build their future.
If they had more resources they would not need to go to land for real food. They could grow it on there island. They could grow their supplies on the floating greenhouse (I mean boat)
They have land on their "big boat"