For all the people from HN dreaming of American immigration, be aware that &#x27;US citizens&#x27; in this article (any anything else pertaining to taxation) should generally be read as &#x27;US citizens and permanent residents&#x27;.<p>Also be aware that while renouncing permanent residency is much simpler (and you&#x27;ll be sure to lose it if you&#x27;re out of the country long enough), you may be exposed to significant tax liabilities for doing so - especially if you&#x27;re holding illiquid startup stock.