The only difference between real gold and bitcoin is simple the crypto nature and the real asset with secure future and investing in crypto is the secure way to make progress for improvement and i think Gold is better for those who have not enough skills to use their money for making profit and now a days many exchanges are operating for crypto investment.
Now, in my opinion, bitcoin is more valuable than gold, because the increase in value is so fast that it is very feasible to become an investment. Unlike gold, growth is slow, but more stable.
Speculators really like bitcoin investment, because the velocity of money in the crypto market is so large that price movements are very fast, especially if there is positive information from large countries or capital markets such as Wall Street that issues statements that support crypto.