Cryptocurrencies have become a hot item to trade and "invest" money. As the market balloons, derivative interactions with other markets have the potential cause rapid deleveraging. In a fragile economy and financial system, this could present itself as a Black Swan event. The idea of quarantining cryptos is an excellent one in my view.
Unless the clearing of cryptocurrencies is isolated and segregated from other products, a catastrophe in the cryptocurrency market that destabilizes the clearing organization will destabilize the real economy, as critical equity index and commodity markets cleared in the same clearing organization become infected.(from the Chairman of Interactive Brokers)