When bitcoin sneezes, altcoins often catch a cold or worse. For many altcoins, that's exactly the scenario that's playing across more than two months of bitcoin volatility and retrenchment. Understandably, that gives some investors pause about embracing crypto risk. Still, as the old saying goes, if there's blood in the streets, maybe it's a buying opportunity. Regardless of asset class, history shows that when market participants become so decidedly negative, markets often react in opposite fashion. Said d ...