why BTC should collapse:
yesterday volume was around $10m and created a $20 increase per BTC
considering there are 10m coins it means an increase in virtual wealth of $200m
however all those bitcoin millionaires are "virtually rich" as if they all wanted to cash out maybe only 10% of them will manage
the money that can leave the system is the same as the money that has entered the system
i would be surprised if there was more than $100m in mtgox. means that with a capitalization of $2b only 5% of it is liquid so only 5% of the people will manage to take out the money they currenly have only virtually.
the real price of BTC is more likely to be around $10-$20 (that is before the bubble started)