Seascrapers
Horizontal Skyscrapers on Sea: Living on the seas isn't as hard as we think. Modify cruize ships a bit, to look architecturally creative like modern buildings, and ship them to mass-orders by future inhabitants on-line.
Now that Starlink is a thing, and that ships can catch fish, to keep all happy, and trade it for other things, in addition to all kind of intellectual services of the passengers, in practice -- just make a web page to allow for massively ordering such said cruise ships, that look like fancy horizontal skyscrapers, and enjoy the life en route to a variety of places.
Ships that look like skyscrapers, just horizontal -- call them "Seascrapers."
最高レベルのラグジュアリー体験と冒険の旅。でも、業界規模ではありません、都市みたいになりません。
"Last year, three cryptocurrency enthusiasts bought a cruise ship. They named it the Satoshi, and dreamed of starting a floating libertarian utopia. It didn’t work out"
// Maybe you need to adjust the inner ear semicircular canals first?
Well, just use X-BOW ship design (video). It helps with rough seas. Then, weather forecast to navigate around stormy weather. Modern ships tend to have multiple sets of ship stabilizers, so that it's generally not an issue. For the case of rough seas, there's always anti-motion sickness glasses. ;)
So, I think this generally is not an issue. What may be an issue, is the amount of steel needed, compared to traditional buildings, and the overall cost performance and overall cost-benefit analysis from the perspective of the passengers. For example, it may be useful for people who want to live with friends of diverse nationalities without worrying about visa requirements, but some may worry about the availability of services comparable to those found on land: some may care about the health security, others may worry about the entertainment options. Such ship has to compete with a developed city district, which adds to the cost, and means that the ship needs to be really big to achieve the economies of scale for certain more expensive equipment that city districts enjoy.
Perhaps multiple ships could join to form something like the fictional "Atlantis", helping realize the dream of "Oceania".
Maybe you need to adjust the inner ear semicircular canals first?
たぶん、最初に内耳の三半規管を調整する必要がありますか？
[Inyuki], thank you for the link. But aboardtheworld.com on the link isn't really like a custom "building", so it may not be possible for a lot of people to order together.
[Inyuki]さん、リンクありがとう。でも、リンクでの aboardtheworld.com は本当にカスタム「ビル」に似ているとは言えない、それで、注文も大勢の人が一緒に出来るとは言えないかも。