FB, Snapchat, and Instagram understand that the demand is simply too small. In order for demand to exist, the consumer must have motivation to use bitcoin. Currently, there is no motivation for a consumer to exchange fiat to bitcoin so he can buy something he could have already bought with fiat.
That's absolutely full of contradictions. One sentence the demand is too small, the next it doesn't exist. Yet exchanges have at least some credible trade volume, no? I suspect that constitutes demand.
You state no motive exists for buying Bitcoin, so presumably everyone who has bought Bitcoin up to now did so for no reason at all? Is that the reason you personally bought or hold BTC, nothing?