There is no much point in arguing with a cult. This phenomenon will have to work its way through the susceptible demographic, meaning that the large majority of "speculators" will have transferred their disposable wealth to a minority of shrewd operators. The masses will subsequently be "seasoned", or immunized and will no longer participate, at best disappointed, disgusted and mildly embarrassed, at worst suffering…
better than the cult of USD. how's that doing this year? or last year? or the year before? or ever? does it even have a THEORETICAL path to value? I'll take my currently existing and computationally reinforced and yes bubbly increase of value.
If Bitcoin falls to 0$ tomorrow, the vast majority of people would shrug and move on with their lives.