Wealth is hard to define. Monaco is wealthy but small for example. India is big but low median wealth
Except I believe you can't break the bank, its forbidden to locals. You can't be "the man who broke the bank at Monte Carlo" after all.
If you can drive a pile driver or construct sea walls Maybe you could be french, and drive in? I suspect they have a tax treaty with France to limit these opportunities, but they do need construction workers to increase the size of the state: reclaimed land from the sea is their principle mechanism of peacefully gaining lebensraum.