Why do billionaires go to Dubai?

Could you possibly explain to me the reasons behind billionaires' preference for Dubai? I'm curious as to what attracts them to this particular city. Is it the tax-free environment? The extravagant lifestyle? Or perhaps the business opportunities that Dubai offers? Could you elaborate on these points, and possibly mention any other factors that might contribute to their choice? It would be interesting to understand the allure of Dubai from the perspective of a billionaire.