I think these two things cannot be compared, Gold or Bitcoin all have their own advantages. Particularly than the current Bitcoin is shark manipulation of huge prices, security is not really absolute, there are still hackers. If you want to be safe, i think you must stay with gold. if you go with the modern technology and modern investment plan be with the bitcoin.
In my opinion bitcoin has its own value and gold has its own. These both cannot cut each other. People spend bitcoin and use gold in their routine life. If people have unlimited bitcoin still they will keep gold, because nobody can deny the importance and value of gold. Other thing is that gold is reliable than bitcoin and doesnt need any internet or blockchain technology.