"It can be that in the next 10 years someone will pay 400 million, or sooner, I do not know".
The Brazilian, 26, only joined Paris Saint-Germain from Barcelona for a world record £198million last summer.
Real Madrid are believed to be monitoring the situation closely although a couple of Barcelona players have also revealed they would love to see Neymar back at Camp Nou.
'It would be great if he came back and of course we would open the door to that, ' he added.More news: Metropolitan Opera Fires James Levine For Sexual Misconduct
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Neymar suffered a nasty foot injury in PSG's 3-0 league win over Marseille last month and consequently missed their 2-1 second-leg defeat at the hands of Real Madrid last Tuesday.
Telefoot also reported Al-Khelaifi and sporting director Antero Henrique will travel to Brazil for talks with Neymar, who preferred a return to his native land for ankle treatment rather than staying in Paris (h/t Marca). Jose Mourinho is seeing Neymar as the final piece to revolve his team around whereas Pep Guardiola reportedly wants the Brazilian as a Sergio Aguero replacement. "Not only because of the relationship I have with him, but because of the type of player he is", he said.
"With Neymar, that's life, but I have the same feelings as Rakitic", Coutinho said at the presentation of the Mediterranean International Cup.
After Neymar left Barca for PSG in the summer, the Calatan giants bought Ousmane Dembele in August before signing Coutinho in January as they sought to replace the influential forward.