Once the XT drama is over and we're approaching the halving, no one has ANY excuse to whine about not getting a chance to buy enough coins. We've been in the 200's for almost a year. You can only blame yourself if you aren't and/or haven't been accumulating all year.
Also, to the panickers and people spreading fud, look at bitcoinrichlist.com. Do you see any of these big dawgs selling? No. I rest my case. There's a winner and a loser in every game. Once you sell you've lost.
No problem sitting out when the price is above 150+. May start buying it if drop below 150 and will definitely buy at below 100.
In all honesty, if Bitcoin drops below 100 I think it would be time to jump ship. No way the price could organically drop that low unless some event took place that spelt out doomsday for Bitcoin. Buying cheap is good, but if the price gets low enough it's also a good sign that the moon is not to be achieved.