The philosophical and political reality of what makes a "real" Bitcoin that people can accept is outside of the question of scarcity. The fact that a Bitcoin can be endlessly "duplicated", at the whims of software developers and/or miners, regardless of how likely or improbable they may be able to be "spent" should definitely give people some pause in their Tulip mania that Bitcoins are not by their nature inherently a scarce commodity. They are scarce only so far as the political reality in which they are transacted continues to keep them scarce.
But they are in fact different. Maybe not as different as gold vs silver but similar in that gold and silver also have completely artificial values driven by hype.
