Lots of people amass wealth in companies, which then get covered into trusts therefore the wealth never really gets converted to personal. Others will use the money in the company to purchase property, and some will build up a pot in a Guernsey company and then move to a sandbox destination to liquidate the Guernsey company under zero personal tax. Lots of different ways to play it. Guernsey is a nice place to live and it's pretty easy but expensive as you can only rent or buy on the Open housing market so central London money. 35min flight back to LGW is good but can't really fly anywhere but UK airports which is limiting. Overall there's worse places to live...