actually what he said make a sense,
but it will affect the entire economy ? i doubt that it will.
Bitcoin has not prove its usability wholly because there're a lot of problems that we will face when people starting to adopt it in their real life.
for example the transaction and the fees itself,
what make it so special compared to other is its usability,but if the hype continue while nothing change i believe it'll be bad for Bitcoin itself in the future.
also CME listing is a bad move for Bitcoin right now but at the same time,
it's the trigger for people to know about it.
everything is like double edge sword for Bitcoin,they have their own advantage and disadvantage.
The thing about derivatives, is that they allow you to go short - and the losses could be unlimited because bitcoin is on a tear right now.
If the people who go short are borrowing to do so, and they default, then the lenders are in trouble. And that's where the trouble comes for teh banking system - bad debts.
If big investors want to invest, they'd be better off using an ETF, rather than derivatives. It'll be interesting to see how this plays out.
I am not too worried about the possibility of people opening shorts on bitcoin, which means betting against its rise. Shorts are widely used in the stock market and very rarely affect significantly big companies, like Johnson and Johnson or Coca Cola. Smaller companies can be very affected though. If there are short attacks on bitcoin there will be some downward trends, but bitcoin will get out stronger than ever as it has happened with many threats before.