The fact that no one knows anything about bitcoins doesn't mean anything to me.
That is not quite making sense. There is a huge difference btw gold / silver and bitcoins. almost all banks and individuals would accept bitcpoins in the world. that also why those precious metals are so highly priced.
but bitcoins are a tiny niche now and alomost noone know about them and accepts them as payments. unless it gets more widespread and used as payments it will stay like that.
Even if it stays a niche, it will be enough for me. Many things, not only precious metals, are not accepted as paiement, and still have a lot of trading value. Luxury items, or collectionnable things (such as stamps, or art).
Even if bitcoin doesn't go mainstream, it can still have a real success.
Of course it would be nice if bitcoin gains some popular success, but to me it's absolutely not necessary.