As a US citizen you are taxed on your worldwide income regardless of where you live. It doesn't matter whether you have a second passport and where you establish your life and business, you must fill the IRS tax form every year because you hold an American passport.
There's no real bank account privacy these days, with most countries adhering to FATCA. So your options are pay your taxes, renounce your American citizenship or use a scheme under third parties names, which can be rather dangerous.