Passed on a chance to migrate to silicon valley 10 years ago, with my family.
Never regretted my decision.

A few 'what if' opportunities come in once in a while, because I have a few colleagues whom I still have contacts with and have somehow made a good impression on them earlier.

However, I still am telling my family that we should be ready on short notice to move to another country. Tough choice, but sometimes, someone's got to make it... especially if this country halts to present opportunities...