Both bitcoin and gold are good for investment and both are volatile too, I would consider buying both of them rather than only one

but bitcoin is crazy stuff that really make addicted rather than traditional gold.
I will continue to support both even though the price movements are very much different.
So when the price of bitcoin is uncertain as it is now, I temporarily switched to buying gold whose risk of decline was not as far as the price of bitcoin but I never left bitcoin, it's just that I chose a more affordable and safe place.
and this I think is also good choice.