Nice place to visit, too.
Unfortunately, I know of a few VERY WEALTHY AMERICANS who have given up ( yes, I said given up ) citizenship to reside in Singapore ( which welcomes them ).
The most prominent one being Eduardo Saverin ( co-founder of Facebook ).
Jim Rogers, co-founder of the Quantum Fund with George Soros and creator of the Rogers International Commodities Index (RICI) also resides in Singapore. His daughters grow up there and are learning Mandarin.