JP Morgan CEO has been attacking Bitcoin for a while now but no one should take his words seriously because he himself knows deep down the real value of these Cryptocurrencies. He is just doing what he is suppose to do being CEO of a Bank that deals in USD. :)
Normally such people speak in Public negatively in this way when they have real interest in it. This strategy is very much existing in stock market trading when someone first gives bad news on a stock only to make it fall first so that they can buy it at low levels themselves and sell at higher profits. This tactics are always good for banks, investment companies but ultimately one who gets fooled by their foul games are small time investors like us.
My advice is not to buy or less in Bitcoins for the moment but if you are a long term investor then just buy in small quantity and forget it for one or two years. Don’t invest more than you can afford to lose. There is risk in every asset that we can invest. Be it real estate, stock market, mutual funds etc etc although they may vary in some degree but still there is some risk so one should take this "risk factor" into big consideration while investing in Bitcoins or any Cryptocurrencies.
One who is a long term investor will not be affected by any price swings in these assets, only short time speculators will get filtered out during crashes.
JP Morgan bought Bitcoins at the low prices after asking everyone to be suspicious about it. You can see the image when JP Morgan bought Bitcoins with 3 days of calling it a Fraud.
So my conclusion :-
Buy at current levels in small quantity and keep adding for every 5-10% fall. I have seen the charts and analysed Bitcoin so my price target is $7000 in another 6-8 months. Do not take it as a investment advice as you should always invest based on your own analysis but this is just my personal opinion.
Disclosure :- I have been an investor in BTC & ETH since a long time.