I made that mistake once before and it will always upset me.  Very first purchase I ever made was a month ago or so and bought 15 LTC at $176. Week later it got close to $400!!!  Being new and not knowing any better I didn't do anything just figured that's the coin world.  Had I actually studied the coin that I just bought instead of only buying it because it was the cheapest going on Coinbase I would've realized that was an all-time high and sold it for a nice tidy $2,000 profit.

 It's amazing how much I have learned in the last 30 days and still have so much more to learn