January 1st 2010: around $0.002 per Bitcoin
December 31st 2010: around $0.80
January 1st 2011: around $0.80
December 31st 2011: around $4.70
January 1st 2012: around $5.00
December 31st 2012: around $13.25
January 1st 2013: around $13.00
December 31st 2013: around $730
January 1st 2014: around $750
December 31st 2014: ? ? ? ? ?
Do you think this year is an exception?
This puts a lot of importance on only 2 data points per year.
What if BTC hits ~$3,500 by October and "crashes" to end the year at ~$740. Using only two prices per year will not show the new all-time high, but the long-term uptrend will still be in place.