Hey

I don't think that will ever happen ... Bitcoins are as important as gold and vice versa
Gold gives us a finer chance of investing in something stable that is for sure not going to go appreciably down, thus decreasing the chances of getting loss,
Well the things like gold, silver , diamond are valuable because of how rare they are,
People tend to accumulate something different than the others, they do right now , since the past thus the notion haven't changed in the years and I don't think it will..thus the demand of gold will always be high which will affect the price of gold thus more people will be attracted towards investing in it.
Both are important at their places , I don't think that will ever happen