If Bitcoin ends the year at 100 USD, we are lucky. After the 2011 bubble, it fell from 31 USD back down to 2 USD. A similar fall would bring us to 17 USD. But as the top was less extreme this time, the fall will also be less steep. As long as nothing special happens, we will see a continuing downtrend and end the year somewhere between 50 USD and 100 USD. In 2015, when media will have forgotten about Bitcoin again, we will be ready for the next bubble which will bring us to over 1000 USD.
I was all the time planning on $100 by beginning of 2014 and I would consider anything beneath that a great buying opportunity.
A fall to $17 won't cause me to even break a sweat even though I bought in higher because it is just a great chance to get to
BTC100 at which point I will be more than happy to withdraw from buying and hoarding and be happy with having my entire pension secured and I can pretty much cross that worry off my list.
The next bubble will surely bring us over $1000 by 2015, but I think another drop will be in store and we will be back up to $1000 by 2016.
This is all assuming the fiat-based economy keeps muddling on. If it doesn't, Bitcoin will skyrocket faster than even the most bullish bulls ever imagined.