Modern conveniences like living in air conditioned houses and traveling new places by cars and planes as opposed to horses, refrigerators, washing machines, the list goes on. None of these are possible without using fare more energy today than we did 100 years ago. More energy means better quality of life. It’s no surprise that using energy in the real world (prove of work) would allow for a much better monetary system to come to life as opposed to the one we’ve lived in over the past 50 or so years where money can be created for free.