I know people who are very positive about Bitcoin, and I think its a currency that has a lot of future. But there will be competing bitcoins.
And I personally when it comes to having some money into an asset or into cash that cannot be multiplied, I prefer a precious metal such as gold, silver, platinum, palladium.
But ofcourse you have to store it in the right place, not in the US. The best is probably a safe deposit box in Singapore or Hong Kong or in your safe in Asia.