Based on my understanding, US employers will fire H1B visa workers first.

If you are betting on H1B visa, you have to 'hope' for xxxx bubble, e.g. NASDAQ/property bubble II :-)

Since US social security is going to bankrupt in near future, in the next few years, I guess US government will turn the current US visa lottery (free) to US biz visa lottery, e.g. you have 1 million USD, you are in :-)