Really though? Unless you're a millionaire you can store gold yourself - in a cheap bank deposit box or (if you're daring) even at home.
“According to the Transportation Security Administration (TSA), it is legal to travel with any amount of cash or other monetary instruments in and out of the United States. However, you must declare your cash to customs if the amount exceeds $10,000 or its foreign equivalent.”
http://traveltips.usatoday.com/travel-airline-cash-9937.html
Traveling with more than 10k of gold or cash is much more noticeable than 10k plus of BTC, aka a piece of paper Wirh some words scribbled on it.