Typical Pump and dump scenario. Well Im a bitcoin hodler so it doesn't matter to me cause i withdraw some of my profits.
No its not pump and dump scenario, it just some whales taking out profit but overall trend of bitcoin right now is quite bullish and this might not stop before bitcoin gold hardfork. I am expecting $10k by next year. Pull backs and correction on bitcoin's price is quite normal and if you look at trading chart you will see hundreds of similar pullbacks in past.
I think yesterday there was a little bearish situation but i think that it was because of the increasing price of USD, otherwise bitcoin is trading in its routin, now its again already recover its position and is trading above 5700$ which is in fact a very positive sign for bitcoin.