Everyone will say scarcity is expensive, the gold is scarcity the same as the bitcoin.
I can't find the reason from the gold valuable.
It can't do anything worth thing...
If you reffering to long term investment i will go for gold and if i go for short term investment then i will go to bitcoin why? Because gold have a longer life than bitcoin because bitcoin has maximum value and maximum count unlike gold if you storing it a long long time it will be more valuable.
How you predict these possibilities first you should think gold is an ornament not a currency but both are valuable so Bitcoin is good profitable investment for long term not a gold.
Bitcoin is 2x profit in after one year but gold is not raise in these ratio it take more than 5 years. No one should wait for long long investment.