Definitely Bitcoin.
The problem with gold is that it is manipulated and suppressed by the "powers that be".
They have no such control over Bitcoin.
No we have exchanges and bitcoin whales for our manipulation.
Good example is when btc hit its all time high, most people now agree it was down to a bot.
A lot of it comes down to how to bots are coded, and if such manipulation by a whale would have the capacity to overcome the dump that most bots would cause, assuming that they are coded to think of any spike like another Mt. Gox collapse.