I don't think it can crash anymore. Not like the last time anyway. Too many people know that the price will go back again and want this to happen. (me included)

What that means in practice is that some people will buy after 5% drop, more after 10%, even more after 15%, etc... I don't believe anymore that we can have a proper crash in this situation. If we do, the price will bounce back in a matter of seconds. I'm probably not the only one keeping an open order to buy as many bitcoins as possible at below £5. Lack of sell-stop orders on mtgox also means there's nothing to balance them out (apart from automatic trading).

A lot of people wanted tulip prices to rise again, as well.

I agree on the bubble phase being similar, but disagree on what would happen afterwards. Tulips becoming cheap meant that everyone suddenly had access, but the amount was still more limitted than in case of BTC. Also the time of each transaction was not even close to what happens at mtgox. There are thousands of orders just waiting to be filled the moment the price moves. On the other hand physical goods shipment took weeks/months.

So while both events may have a similar cause/progress... there's a huge difference in how the market itself works.

Actually they would trade tulip futures and, critically, options, which allowed for quick trades and leveraged speculation.

Any day now

to me, the surest sign of an impending crash is when people start to think something is infallible

You should really photoshop those dollar signs into bitcoin symbols.