Crypto-linked stocks are displaying increased volatility after a U.S. court ruled that cryptocurrencies are securities, reversing a precedent on Ripple's token XRP a few weeks ago. The ruling by a Manhattan federal judge came as a bane to overall crypto sentiment, with major cryptocurrencies - such as Bitcoin and Ethereum - displaying weak performances following the decision. Stocks of companies with stakes in major crypto exchanges here are also displaying instability, as the latest ruling heightens regulatory risks in the crypto industry.