Fleets of armored trucks piled with gold bars and coins have been streaming out of midtown Manhattan in one unexpected consequence of the gold craze.

Amid gold's rise -- it has gained 32% this year and reached a record on Monday -- investors have been loading up on bullion and coins. One big problem now is where to store it. The solution from HSBC, owner of one of the biggest vaults in the U.S.: somewhere else.