Bitcoin (BTC) has spent virtually all of December locked between $85,000 and $90,000, while U.S. equities rallied and gold hit all-time highs. That's left bitcoin investors frustrated, and the explanation lies in derivatives mechanics. Now, those same mechanics indicate that the largest cryptocurrency could be making a break toward the high end of the range. The more likely outcome after expiry is an upside resolution toward the mid $90,000s rather than a sustained break below $85,000. The key driver ha ...