https://www.cnbc.com/2017/11/02/bitcoin-futures-mirror-1637-tulip-bubble-crash-ubs.html >CME Group announced plans for bitcoin futures contracts earlier this week, a move that UBS analyst Paul Donovan has compared to the introduction of a similar product just before the tulip bubble burst in the 1600s. >The tulip craze in the Netherlands in the 17th century saw the price of the flower skyrocket. This resulted in a crash of that market in 1637.