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.
Investing in gold is always a stable profit. Bitcoin is even more attractive investment because bitcoin gives you more and more profits when compared to gold.