The opinion of JP Morgan towards Bitcoin and cryptocurrencies in general isn't relevant anymore.
They are constantly trying to spread FUD in order to lower the Bitcoin price,so they could secretly buy some cheap Bitcoins.Banks like JP Morgan,Goldman Sachs,Citibank,Bank of America are well known for manipulating any market they are in.I wouldn't trust the analysis or opinion coming from any guy that works in those banks.
They are a bunch of liars and hypocrites.