But you have to think that there are some serious flaws in the argument. Bitcoin has limited supply as compare to the Tulip mania back then, when everyone can literally have harvest their own tulip in their backyard. That's how the bubble burst because the supply is unlimited as compare to bitcoin which has only 21 millions coins.
All things being equal, there is no reason why one virtual currency should be worth more than another.
Tulip mania and bitcoin mania are both caused by the delusions of some folk. It's entertaining to watch from the sides but don't gamble on it, its trend is definitely down.