im pretty sure almost everyone on the forum believes in bitcoin.if they didnt, what would they be doing on this forum lol.
as for myself, i think bitcoin has great potential, which is why im holding on to it. until it skyrockets.
People who don't think Bitcoin will be a future currency or when they simply don't like it enough, they just stay here for the signature campaigns to earn some bucks. Just look at the newbies who are joining as their first posts are 'Where can I join a signature campaign?' & 'How to earn money quick?' etc.
I think your point of view is a little too pessimistic.
While newbies are asking around for sig campaigns, they are learning more about the coin and also understanding the great value and potential of it.
So, as things go on, many of them could also start really believing in Bitcoin...