The rebound effect state that the savings in energy or resources initialy induced by the use of a new technology are partially or totally compensated by the following behavioral adaptation of the society. The effect is exprimed in % but can be difficult to calculate. This has an important effect on economy and technology. We can also make a paralele with the question often asked when a disrupting technology rise: does it will eradicate jobs? This was asked for cars, trains, robots, manufacture, internet, #artificial-intelligence, #blockchain...