> How much energy does watching porn consume? Playing video games? Watching a movie? Browsing Facebook? Using a ski chair? Visiting an amusement park? Going in vacation? Cooking your favorite type of food? Making ice cream? Driving to your friends? Listening to music? Concerts? Having a party? Banking? Casinos?

The difference is that, for all of these, the incentive is to lower the energy usage. For Bitcoin, the incentive is to increase the energy usage, until the amount of energy used costs the same as the amount of Bitcoin received by the miners.