The psychology of previous investment kills both investors and gamblers.

You need to ensure you don't get into a situation where the US is taxing your worldwide income, though in CA there are tax credits to avoid double tax its still not ideal

The house would be considered a capital asset, so to be conservative, I would estimate 20% of the gain for tax, plus an additional 3.8% for the net investment income tax if your total adjusted gross income (worldwide) is over 250k.

We have a wide network of investors worldwide, but our business operations happen right here in metro Detroit.

Most over leveraged owners are like addicted gamblers, they don't believe they have a problem (over leveraged) until the market turns and they go broke/bankrupt.

Cold still kills more humans worldwide than heat, so global warming is good for humans. 

CA taxes residents on worldwide income but may provide a credit for taxes paid to other states.

Their total assets under management for is expected to top $5.4 Trillion in the next six years totaling more assets than hedge funds.In total, the worldwide wealth of families with private offices is expected to exceed $9.5 trillion in the same time period. 

You may want to research now how the country taxes different types of investments(Equity, bonds, real estate, etc)That can tell you potentially what investments to have.The issue with potentially becoming a US citizen is that they will tax you on worldwide income.Therefore, if you get the citizenship and move out of the US, you may want to see if you would be exposed to US taxes, whether you will want to move back to the US and if you want to renounce your US citizenship.I agree that if you are not sure of living in the US, you may want to avoid doing items such as having a large balance in a retirement account that may be considered taxable by another country when you retire.Best of luck

CA taxes residents on worldwide income but may provide a credit for taxes paid to other states.