After Friday’s “halving” event, which cut Bitcoin (BTC-USD) block rewards from 6.25 bitcoins to 3.125 bitcoins, miners are even more important to the cryptocurrency ecosystem. The three miners we’ll explore are looking to improve their efficiency by updating their all-in sustaining costs (AISCs) and optimizing their firmware; they also come with upside potential going up to 127%. Under the new reward system, raising the hash rate per unit of energy can increase your profits. Due to the lower profit margin, ...