I'm not sure your strategy is sound. Nonetheless, if you're determined to work in another country (assuming you're not a citizen), you will quickly run into legal trouble: in most countries, you need to have some sort of work permit, which can be difficult or impossible to get.

If any of your ancestors are from Europe, you may be able to claim citizenship in their country of origin. This is the legal principle of jus sanguinis. The Wikipedia article on jus sanguinis has a list of countries that have that style of citizenship law (not all are European).

http://en.wikipedia.org/wiki/Jus_sanguinis

This is cool, because -- as I understand it -- if you're a citizen of a European Union member country, you can legally work anywhere else in the EU. For example, if you can claim Spanish citizenship through your grandfather, you can go work at a startup in London. (Starting your own company might be a different matter, though.)

If you're descended from Jews, you may be able to claim Israeli citizenship. I don't know much about this, but Israel does have a startup scene.