Bitcoin (BTC) reversed its Saturday rally and fell below $72,000 after the United States and Iran failed to reach an agreement following peace talks in Islamabad, Pakistan. The largest cryptocurrency had climbed near $74,000 on Saturday before dropping to an intraday low of $71,168 during early Asian trading hours.   Bitcoin Drops as US-Iran Talks Fail After 21-Hour Islamabad Session At press time, BTC traded at $71,716, down 1. 84% over the past 24 hours