It`s always better to diversify your wealth and never keep all eggs in one place.
I would say both or 50/50 or maybe 40/30/30 including real estate.
Gold is "evergreen" and bitcoin is the new gold
For me i would choose bitcoin only and i would not keep it for ten years because we dont need to wait that time to grow your money what if in thw wxact ten years the bitcoin dump, so you think this is not profitable. For me if the price of it will rise sell it and if the price again of bitcoin will dump buy again.. This is not like gold that in the next year the price would be rise.. But if you compare in bitcoin it has many profit than gold. It is depende on your strategy.