Does Wall Street really understand Bitcoin? No, cyrptocurrencies where created to be outside the modern day monetary system, and they are treating like a stock. People are trying to get their money away from these people, and Wall street wants it back. Now I do believe in human behavior, and that can make Bitcoin act like stocks when human emotions come in.
The say Bitcoin will hit 1000 DOLLARS, I don't know if they realize that this is a Dollar competitor, and as if the real believers in this new currency care about the USD. Not to mention USD is still king, but there are things knocking at the door. I believe they lack the big picture view on this.
Now I do agree with him saying we are in a bubble. There are a ton of Crap Coins out there. Half of them will go away. VIVA is a perfect example.
https://www.cnbc.com/2018/01/19/bitcoin-could-lose-90-percent-of-its-value-wall-st-veteran-boockvar-warns.html