as an intellectual exercise this is interesting but this will never get past the theoretical stage.
this idea is nothing new. there have been self contained autonomous structures around for decades that work much better than this. they’re called “cruise ships”.
climate change isn’t going to cause massive flooding like this building is designed for. that’s not the way it works. melting of the polar ice caps is causing gradual rising of sea level that happening on long term timeline. it is predicted that the sea level will rise 2 meters (6 feet) by 2100.
don’t get me wrong I’m not trying to deminish the seriousness of global warming. I’m just saying that the designer really doesn’t understand climate change.