Well, I agree that Bitcoin is a risky investment but the rewards it gives are way better than gold. The volatility of the Bitcoin makes it a good investment for those investors who have mastered the volatility of the crypto-market, on the other hand the ones who hold Gold then they will have to wait for decades to get any good benefits from its low volatility. If someone who invests money into Bitcoin and hold that investment for 2-4 years he/she could profit a lot form the volatility of the market, while the one who holds gold for 2-4 years then there is very low chance of any substantial profits.
both differ in the risk management that must be carried out by the holder. Gold has a smaller risk of market volatility. I don't see which is more profitable. but if you talk to those who hold gold and don't really know Bitcoin, then they will prefer Gold because of the small risk. but if this question is for those who hold Bitcoin and Gold, maybe there will be an answer which is more profitable.
if we speculate on the time frame in investing, we also cannot see which future will be more profitable. it could also be that the price of Bitcoin in the planned time is also not as expected. we can only see what has happened in the past. however Gold has also seen a nice increase for the holder.