You have a point gold could be hidden to make it safe but its unlike bitcoin that you could store it in many place like online or hardware wallet or even in you pc. Digital currency and a Precious mineral cant be really compared since it has many advantages and disadvantages among the two.
It is ridiculous to see this actually. You are comparing gold to bitcoin when what you are comparing is actually the advantages of bitcoin over gold. Admit it there is nothing that gold has that is much better than bitcoin except for its stable price and apart from that there is none already
Bitcoin is more stable in terms of investment for now, because it is widely accepted and ordinary people would prefer to have gold instead of a thousand bitcoin, that is how gold had already enter into our economy and we have trust it so much, only us who sees the benefits of bitcoin but we cannot ascertain the future still unlike the gold.