Because it is much more popular than gold nowadays because the millennials tend to  know the future rather than the past that is their thing that is why they hate histories. And besides it is much more easiest to have to acquire eather than gold because if younare a kid you cannot have gold easily rather than jewelry but in bitcoins it is much more easy to have just a click and you are ready ro go and a lot of money can bitcoins gave to you. And gold will take up much more space in tour house for example