From a startup founders perspective, it might be worth mentioning that if you own the business personally in the US, you likely qualify for so-called the small business exemption (QSBS) - that means from the price for which you sell your company the first $10M (yes, million!) of capital gains are tax free, and after the latest reform $15M. If you're married: x2.

Yeah but most people want to do business in US, its all the money goes

Not worth the hassle anymore.