There seems to be some correlation between a spike in the price of Bitcoin and the dip in alt-coins. It may have some correlation to the dropin Steem price.
To your point about buying on lows and and selling of during highs, this only works if you truly took the time and effort to understand what exactly it is that you are investing in.
There are many a times when buying low also means buying a currency that will never see a high.
I do not believe that is the case with Steem however. That's why I'm here :)
God Speed Brethren.