The velocity of Bitcoin in such a situation would be much higher then the velocity of gold. Bitcoin is much easier to send around the world. Even with significant lost Bitcoin, it could fill gold's role with a much lower price than half a million each.
But isn't the point in gold's role just having it to save your wealth aka store it?
So the duration of the transportation shouldn't have that much influence on that.
But it's utility is diminished because it's heavy and must be guarded all the time. Think about a million dollars of gold vs a million dollars of bitcoin, the later is magnitudes easier to keep secure and spend. Bitcoin has the convenience of cash with the security of gold, insomuch as there is no third party risk of a Central Bank.