Well we have different opinion about these happen now on why the bitcoin are in take $11000 for now and the altcoins are still drop.
But not all altcoins are drop to those only in top are moving or followed by bitcoin. And we all know it needs for bitcoin to rise up first before the altcoins be follow on it.
That is what we used to see, altcoins are usually following the movement of bitcoin and it became the basis if alts are going bullish. Anyway the market is high volatile and unpredicted so the price of coins can go up and down in a short period. Its like a roller coaster ride and though there are many predictions by analyst, still we are not certain is these are going to happen.