Tulips moved 6000% and collapsed, in six months, the moves in crypto currencies are bigger and they have lasted longer. See http://www.elitetrader.com/vb/showthread.php?t=281748
It certainly wouldn't be a buy and hold for me no matter what the historical chart says, try to remember the chart onlys shows you the history and has no bearing on the future other than to help identify support and resistance areas, I would just look to trade it short term for better opportunity
One striking comparison is that current Market cap of the flower-industry is about the same: 10 billion dollar (8 of those in the Netherlands alone)
The price charts aren't the best indicator. It's the grow in User-base: the number of people and businesses adopting the currency: which is 20% each month: http://www.bitcoinpulse.com/