Well, as a French, I'm not really willing to move to Silicon Valley: 1) dealing with immigration people in US Airports as a foreigner is a enormous risk by itself. The probability of a bad event is low, but the stake is very very high if it occurs : you have no law to protect yourself in the international zone, and international conventions are notoriously ignored in certain countries. 2) is fleeing your country a really great thing at all if your life is not at stake ? 3) is going where everybody goes to do what everybody does really smart ? Is being mainstream smart ?

But I know that this is not taking the easiest path nor is it doing everything I can do to reach success, since I would raise my success probability by simply moving to Bay Area.