So it's valuable because it's scarce and it's liquid because it's valuable? I imagine you can see how a skeptic might view this. I would be skeptical of gold coins too, but for the fact that a gold coin today would have been valuable in ancient Rome as well. So I don't really understand why gold is so valuable, but the fact that it's been very valuable (to varying degrees) for 5000 years leads me to think that that will hold for at least for the rest of my life.
I agree that Bitcoin has advantages as a store of value over gold. But it's value is only as high as people value it for, so the trillion dollar question is whether it's just a fad. For those of us who are skeptical, there are definitely things that could bring us to the other side, such as sustained value for a longer period of time.
