The difference is this:
Several hundred years after the tulip mania, tulip bulbs are still actually worth something. They have intrinsic value.
Bitcoin, on the other hand, will be practically worthless a few years from now. By 2020, BTC will trade for way less than one dollar per coin. By 2025, BTC will be valued at less than $0.05.
Seriously. You would actually have us believe that you have posted hundreds of times on a forum about a commodity which you think will have no value in the future..right.