Today I would pick Bitcoin for investment. Gold's price is pretty statable and almost doesn't changing nowadays, but bitcoin is not so fixable and it's easy to earn on course difference of bitcoin now. So if I would have money for investment I would chose bitcoin.
Yes investing in bitcoin can be profitable not only because of halving, but the price will be even more higher in the end of the year, and bitcoin can give us better profits in compare to gold.
sure bitcoin is profitable than gold right now because of the hype, but i wont expect much after the halving, a lot can happen after
the funds of bitcoin is cut in half again, like miners will quit mining if the bitcoins price doesn't increase to the point that it is not profitable
for them to continue mining, or too much people selling their coin to take advantage of the price, that event can lower the demand of bitcoin and can also affect the price of bitcoin.