Most of the time of this year bitcoin has been decreasing it's price.Most of the investor has lost their price and there is probability to increase bitcoin value by this year 2018.For this reson peoples may moan about bitcoin.
For me they are talking about bitcoin cause they still believe that price of bitcoin has the biggest impact on price of other coins which for me is not in 100% true, of course when market is recovering bitcoin price is going up but it is not told that other coins need to follow those trends.