Lyon president Jean-Michel Aulas would reject any proposal less than €70m for their young talent

And this lad is only 16-year-old!
He has refused to sign a long-term professional contract with Lyon. Top European clubs are already sniffing round him: Chelsea, Arsenal, Barcelona, Bayern Munich and RB Leipzig are set compete for Geubbels.

Jean-Michel Aulas explains why he put such astonishing price tag on young forward:

“They [he means Monaco transfer earnings] have just cashed €300m or €400m, so they will pay for Geubbels. It is the end of his contract in 2019. If Monaco makes an offer of €70m we will be disappointed because we believe [in Geubbels] a lot. We are reassured by his valuation.”