Gold or bitcoin depends on your goals, if you want a safe, low volatility investment and don't need a lot of return, then gold is clearly the better choice. But if you are looking for an investment with a high return and are willing to take all risks, then bitcoin will be the perfect choice over other investments. It would be great if we knew how to diversify these two investments, both minimizing risk and providing the highest return.
Investing in gold should probably be a smaller part of our investment portfolio, since this investment is aimed at preserving our savings, rather than making big and quick profits. Bitcoin can give great profits, but there are also more risks, so everyone must decide for himself how much and in what he wants to invest. Also, there should always be free funds to replenish your portfolio in case of large market crashes.