Mining. In cryptocurrency networks, mining is a validation of transactions. For this effort, successful miners obtain new cryptocurrency as a reward. The reward decreases transaction fees by creating a complementary incentive to contribute to the processing power of the network.
It matters because the actual coffee flavor is extracted from grind better at higher temperatures. I'm not a scientist but I trust those that have done the research and they say that the optimal temperature for hot water in a coffee pot is between 195-200 degrees or just a little under boiling.
Almost all coffee is brewed with the water tmperature way too hot-at the 200 degree myth! This brings out way too much bitterness and destroys the taste of most coffee. For pour over the perfect temperature is between 170-180 (max!). For smooth, rich tasting cup of pour over, try it.