People may not be aware of the Big Freeze. ItΒ is the theoretical end ofΒ everything. It is the stage at which the universe has stretched to having no leverage ofΒ thermodynamic energy. In other words, it is the threshold at which the entire universe will cease toΒ maintainΒ motion. The entire universe will becomeΒ absolute zero. It is theΒ coldestΒ temperature, where everything is at a standstill. In short, the Big Freeze is a period of infinite, everlasting, andΒ absolutely quiet darkness. It will not repeatΒ for another 100 trillion years or more. It has to be kept in mindΒ that an actual perpetual motion machine would be capable of running for at least that long.
Many plans for perpetual motion machines may be seen onlineΒ that claim to be functional. Looking at those designs, it is not illogicalΒ to believe that some of them could (if properly designed) continue running. If someone wants to succeed, the impact would be massive. There is an infinite supply of energy. However, itΒ would be more than that by way ofΒ unrestricted energy. Perpetual motion devices governed by the Law of Perpetual MotionΒ are, unfortunately, unattainable related to the inherent physics of the universe.