if u go to europe, it depends on the individual europen country and some EU regs.
if in Asia - its still less regulated.
some countries dont have double taxation laws. but usa has it. so the profits u make in other countries are still taxable.
if u open a separate entity say, in HK, singapore, then u have to abide by their rules and pay their taxes but not usa.
many countries have double taxation rules with usa. u got to check with the treasury but u will be sent fr pillar to post. best to get an international finance lawyer