[poulsbohemian]

Here's a simple reason why: can you get the visas needed to move yourself anywhere else and can you find the resources you need in that country?

There are lots of places I would consider over the US, but in many countries to come in and start a business it will take showing that you can properly capitalize the business and provide for yourself until the business reaches profitability. You may be in tens of thousands in moving costs and legal fees before you even get yourself started in order to set up shop in a new place.

And, if your target audience is in the US, you may run into consumer perception or other problems if you are based elsewhere.