Bitcoin (CRYPTO: BTC) recently saw a major downwards price movement after Tesla Inc. (NASDAQ: TSLA) announced it wouldn't be accepting the cryptocurrency as means of payment over environmental concerns. What Happened: According to a recent Business Insider report, there are seven metrics that traders and investors should check after Bitcoin plunged as much as 17%, to below $50,000 from a high near $58,0-00. The first one of those metrics is the aggregated open interest on Bitcoin futures, which fell from a high of $20.39 billion on May 12 to $18.79 billion on the next day.