Today, 1 Bitcoin is worth around $400.
So if you bought 10 BTC exactly 1 year ago, and told yourself: ''I won't look at the price or exchanges, I'll come back and see if my investment paid off 1 year from now.''
You would've been a happy man. $2,750 profit, no headache, no doubts, nothing.
I know, I know. The opposite would be the case for someone who bought it at $800 exactly 1 year ago (but we're not there yet).
Bitcoin did crash (1100-400), but if you look at it long-term, we're still waaay up.
Don't think about short term gains. Buy and don't think about it. Bitcoin will be between $7k and $10k within 4 years.
http://bitcoincharts.com/charts/bitstampUSD#rg730zigDailyztgSzm1g10zm2g25zv