gold is safe for so long but as technology grow every second everything change so fast and its not that far we see bitcoin more powerful than gold or anything else.it takes time also .maybe 3/4 years until we see true power of crypto and blockchain.
No doubt gold is safe but if we talk about the profitability bitcoin will stand out among this comparison since we all know how good bring up with bitcoins and for several years there are so many people earning with it. In relevance I think gold is much stronger since the demand of bitcoins is not quite high as gold since if we talk about global economy for sure many prefer to have gold than bitcoins.