First of all, money is a tool to measure the value of things. Under the same environmental conditions, the energy difference between a piece of iron and a piece of gold is not very big, but the rarity difference between iron and gold is very huge. Secondly, the value of money is relatively stable. Energy will vary greatly due to various factors, even if the difference is small, it is very unstable. For example, a minute ago, I bought a piece of meat, 100 unit energy. After a minute, this piece of meat may have 105 or 95 units of energy. At this time, A bought at 95 and sold at 105. Isn't it possible to earn the middle price difference for no reason? The current stock market and futures are based on this principle, but it should be noted that the stock market cannot be bought and sold on the same day, let alone accurate to the minute. In this case, everyone should stop working and stare at the instrument as a whole.

In addition, money can be preserved and stored. Energy can't really be preserved, and the exchange between energy and matter, energy and energy is going on all the time. There is no guarantee that any country has lost hundreds of millions of units of energy today, or that hundreds of millions of units of energy have disappeared.

The idea of the landlord is actually to use virtual currency instead of physical currency. But you shouldn't confuse energy with virtual currency.

If, as you think, you should pay attention to collecting the heat from the exhaust pipe when driving, where will this heat be stored? Why not use an electric car? The energy obtained by power stations varies greatly with different power generation methods. You know, a car full of nuclear fuel is equivalent to dozens or hundreds of cars full of coal.