Shantanu Starick does, and has been for over three years. What a way to see the world. This guy is pretty inspiring, on many levels. Is there some utopian future where the world works this way? Not likely. But if his example gets more people thinking about doing it just once in awhile, it could be pretty cool. It is pretty cool.
I have been living this nomadic life for over two years and have met some incredible people and have had some likewise amazing experiences, all without spending a cent of money on anything. I will continue to trade with as many people as possible until the well of human compassion and curiosity dries up and I reach all seven continents.