The pandemic is having major financial implications across the world and is expected to have a massive effect on the transfer market.
And Cohn-Bendit, well known in his country and often outspoken, has raised the uncertainty over the nation's most prized asset in football.
Cohn-Bendit believes Mbappe's value in the transfer market is going to be significantly less than it was just a month or two ago before the COVID-19 lockdown in France.
"And who will be able to buy him? This crisis will clean up the irrationality of professional sports. It is as if there had been a nuclear attack and everything has to be rebuilt but at other bases.
"There will be de facto regulation and it will be necessary to go even further with a salary cap. It is a reorganisation that hits not only player salaries but also image rights and advertising.
"We have to break the system of agents, of those who do exorbitant business in football. I don't think players will be worse because they are paid less.
"In the future, for example, football television contracts will have to put a percentage to the Olympic sport and that for amateurs."