The problem with Gold, as real as it is, is that most people would rather carry around slips of paper that represent gold promises, than the actual gold itself. There's also significant risk in securing/hiding it if you amase any reasonsable amount.
Indeed its pretty hard and the fact is also that you need to hold it pretty long so I think you can than better hold the bitcoin to be honest.
Yes, if you take into account the safety, Bitcoin is certainly much safer. But gold is good to do long-term investments