Hmmm... It's old news but this was made viral only for manipulation. Even i came to know that they bought heavily after the fall , the fall was due to china ban on ico and other exchanges. you can look at the article link for more information on how much did jp morgan bought after the fall, link given below.    https://news.bitcoin.com/after-the-boss-calls-bitcoin-a-fraud-jp-morgan-buys-the-dip/.

This is how the professional enters and exits from the market they make other trader's to sell their bitcoin and then they enter in their trades with heavy positions.Professional and Smart money enter's their position when amateur's exit from their positions, this is one of the thumb rule of trading. I think bitcoin is currently trading near $4000 levels again and now it will make a new record high for sure check it yourself.