Not sure if this is the case here but these expensive paintings are often used for money laundering. The value of some of these paintings are crazy, the Mona Lisa has been valued at over $1 billion dollars.
I think that'd cost a lot to be used for money laundering...
Guessing that you'd have to lawless land to store your earnings initially before you import them, you'd need a lot of guards to store it and then a lot to help you transport it past highwaymen and pirates (assuming they're both still a thing in poorer islands).
Obviously there are other places like UK and US colony islands that charge less tax/no tax but probably also have less security than the mainlands...
At the moment the rich seem to be getting out of stocks, and the central banks are having to buy them to save the market from collapsing.
Then how are we still in an out of control bull market? You would think if a significant number of wealthy individuals were dumping their stocks we would have at least a good market correction, but we haven't seen that in quite a while.
If you have enough stocks, you have to pull out slowly otherwise you get arrested for crashing the market (it's happened before). Market manipulation is taken seriously, even if it's accidental.
@Jet Cash, banks buy shares on the stock market for people to store money in stocks ISAs I don't think the banks are buying many shares for themselves (especially considering they're only buying shares in each other in order to keep each other afloat - lloyds bought halifax for example)...