Despite doing at least OK for retirement savings (at least compared to the average, which is pretty dismal in the US), I'm afraid I couldn't even pay the maintenance upkeep on a super yacht for more than a few days, much less make it go anywhere. My daughter is still technically a Russian citizen (along with US), but alas doesn't own a RU commodity company. I guess we could be 'temporarily embarrased' oligarchs, but the UK put the kibosh on that visa program primarily due to those abuses.
In researching it a bit more I was completely wrong - there's tons of non-work immigration to the UK, just not from the US. Most is from parts of the far-flung empire, where there is still legal rights to move, or EU citizens still living there. Net immigration from the UK's numbers seems to be way up, unlike some other EU countries. One of the promises of Brexit was immigration control, but that seems to be falling through.
We both just loved the ability to quickly and easily get to just about anywhere in greater London for little money. Coming from one of the worst 1st world places on the planet for mass transit (North Texas), it's a revelation how awesome the tube, bus, and train system in London is. Plus we could
breathe there. I grew up here in North Texas, and it seems every year my body rejects the allergens endemic to this area more and more. London has none of them.