I know this was an off-hand remark that you're probably not thinking much about, but you're absolutely right, and it might be worth seriously considering it. Moving to the US is probably the single biggest improvement you can make to your career and opportunity options. You will never have as much opportunity in Europe as you will in the US, not in the tech world. You might be able to eke out some success in Europe, but it'll pale in comparison to what you could've achieved in the US.