Just sharing esp for the newbies.
Don' t wait to invest. Invest and wait, this is the mantra of long term investor.
Short term/Day trader don' t wait and don' t invest. They prefer volatility. If there is no volatility, there is no profit.
They co-exist. 
One is managing emo, the other one works best when yoyo emo is created.
Cases of ppl having cardiac condition when they are in this is nothing new, applicable for both side of the fence, not just for those get caught in this unwillingly.

If you can' t wait, you trade.
If you can wait, you tai chi, you invest.
A good growth stock will eventually give you good return over time, i repeat, over a period of time.