Bitcoin's latest leap higher brings the digital currency closer to a near-term top, Goldman Sachs' chart analyst said. The digital currency is riding a "fifth wave" of an "impulsive" rally that could run as high as $4,827 in the short term, technical analyst Sheba Jafari said in a Sunday report of charts to watch for the week ahead. However, "once a full five-wave sequence is in place, the market should in theory enter a corrective phase," she said. "This can last at least one-third of the time it took to complete the preceding advance and retrace at least 38.2 percent of the entire move." At the time of the report's ... (full story)