Saying the 'value' of the derivatives market is $524T is disingenuous. The notional value - sure, but that's like saying the value of the lottery 'market' is the jackpot times all the outstanding tickets - http://www.newsweek.com/600-trillion-derivatives-market-9227...
That's my point though - that there are a lot of things in the economy where the total dollar value may be high but it's largely the same participants trading amongst themselves, and the contracts net out to some much smaller value. Bitcoin volume and Bitcoin market cap are not unique in this regard.