I'm a European (born and bred) who just renounced US citizenship (gained through parent) and I have to counter you. Yes Amsterdam is way better than any US city but that has nothing to do with internet entrepreneurship. The EU, European governments and European culture in general do not support entrepreneurs. I bootstrapped a company in Berlin and all the government did was try find ways to shut us down. Our main competitor (Rocket Internet company) had the means to deal with this BS but as we were a small scrappy bootstrapped company we were treated like dirt. The Stripe story is very telling in this regard. Before moving to SV they tried to launch with Irish banks as partners and were laughed at for being naive children. No one is laughing anymore.