With GOLD you have at least something in your hands, no matter if it is really worth the price or not. Bitcoins are just bits, only virtual, nothing manifested. You cant hold it in your hands like money (yeah its only paper), gold, ice cream or whatever. I think most people, including me, have problems with this.
Worse. Bitcoins are not even bits. There are no bitcoins, only the transfer of bitcoins.
If you have problems with this though, the door is over thataway.