Both
For me i prefer to choose both of them as my investment because gold is safe investment and bitcoin because the price is rapidly increasing .
Gold is a good asset or as a investment, but I think you will be bored when you are always looking at the price especially when you are a used investor or buyer of digital currencies particularly bitcoin. Gold slowly increases price while bitcoin, well it don't usually go up but apparently, it always change every single second the reason bitcoin is risky but worth it.