"Letting you all know that I have resigned as CEO of ??@BinanceUS," Brooks wrote on Twitter. "Despite differences over strategic direction, I wish my former colleagues much success. Exciting new things to come!"
Since the first digital currencies were devised after the financial crisis, $2.3tn has been invested in them. But how do they, and other assets transacted on blockchain technology, actually work? And what risks do they pose? Read our explainers

If this type of extreme drop bothers you, you may have too much riding on your crypto investments. You should only invest what you’re OK losing. But even if the drop is making you rethink your crypto allocations, the same advice still stands — don’t act rashly or upend your strategy too quickly. Reconsider what you might be more comfortable with going forward, such as allocating less to crypto in the future or diversifying through crypto-related stocks and blockchain funds rather than directly buying crypto (though you should still expect volatility when cryptocurrency markets fluctuate).
We further explore the significance of cryptocurrency fundamentals at the aggregate market level using traditional asset pricing tests. For this analysis, we construct risk factors that are based on aggregate values of computing power and network. We denote the aggregate computing power factor with ACP and aggregate network factor with ANET. The innovation in constructing these factors is that we express them in cryptocurrency return units following the factor mimicking portfolio approach (Knez et al. 1994, Lamont 2001, Vassalou 2003).