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.
There are several opinions out there when it comes to the best temperature at which to brew coffee. The good news is they all come in within a few degrees. In general it can be agreed that the optimal temperature for a perfect cup of joe is somewhere between 190-200 degrees Fahrenheit.