We can say whatever we want comparing bitcoin to gold, gold is still the safest asset to invest your money. Bitcoin is still too much volatile to be considered as safe. With gold you may not make a profit but it won't make you loose money, while with bitcoin you may lose 10% in 1 day wich is a lot when yu are investing, specialy a big amount
But because of this voalatility people can get good profit and of course if there is profit, there will be some negative too mean while on gold we can not do much since the price is much more stable than bitcoin. But it still depends on each person, how they manage to do this. If they want to earn may be they should take bitcoin. If want to long term, then choose gold better7
I wouldnt say long term. I would say safest invest is gold. Bitcoin can make you much more profit then gold, even in long term, but you take more risk investing in it. Its all about risk, how much you're willing to take it.