I think there's something to be gleaned from looking at this one; maybe more so if I jiggle the words around a bit which whilst it may take us away from what The Fool was saying, I think represents the position of some fools at least:
Greed is refusing to sell even when you believe an imminent big sell is likely.
Sayings such as 'All things must come to balance' and 'If it seems too good to be true it probably is too good to be true' etc. form part of the belief structure of many and so even if there are no rational reasons arising out of the fundamentals to believe the price will go down, if enough of the Bitcoin being held now is in the hands of people who believe this is unsustainable simply because the percentage profit 'feels too high', 'isn't right', 'can't be sustainable' etc. and yet they still hold onto their Bitcoin hoping against their 'better judgement' that it will keep going up then we really do have the makings of a 'crash' because these are the weak hands who are likely to panic sell even as the price plummets.
Whether this happens and how quickly and deeply it goes depends on the proportion of Bitcoins in the hands of those who think that way relative to the amount of fiat available to stronger hands to say 'thank you very much' and pick up the cheap coins The ratio between the two may be one way of expressing what I see as the primary difference between today and 08 Jun 2011.