While bitcoin (BTC-USD) has lingered in the $28-$31K band for the past two weeks, there's a sign that the world's largest cryptocurrency may be poised to rise. Speculators are getting a "little more bullish" on both bitcoin (BTC-USD) and ethereum (ETH-USD), according to Bespoke Investment. Bitcoin open interest has risen 6.92%, its highest level since November 2019, before the pandemic and at the time when BTC was trading below $10K. The number i...