Extract: Prices on cryptocurrency platforms Bitcoin and Ether have been volatile in recent weeks after China’s central bank recently stated that all cryptocurrency-related activities were illegal. That is widely seen as the county’s effort to curb currency manipulation, flight of capital, and technology-related risks it perceives in cryptocurrencies. But it would be “dangerous” to assume that the decline and volatility in cryptocurrency prices are a result of China’s ban, according to Kevin Werbach, Wharton professor of legal studies and business ethics.