The former Paris Saint-Germain midfielder made the prediction in an interview with Goal, arguing that the Premier League club would be the most likely destination after the forward's time in Spain.
“I really think that after Real Madrid, if he wants to leave this club, and that's a big if because he will stay there for a long time, he will go to Liverpool, definitely,” Mulumbu said.
The 27-year-old Mbappé is currently established at Real Madrid, and there is no indication that he is preparing to leave. Mulumbu nevertheless believes the Frenchman's previous connection with Liverpool could make the club an attractive option in the future.
He does not expect a return to PSG, particularly given the circumstances surrounding Mbappé's departure from Paris in 2024.
“It's ironic, because the way he left PSG was not the best,” Mulumbu said.
Instead, the former DR Congo international pointed to Mbappé's previous discussions with Jürgen Klopp and the forward's admiration for Liverpool.
“He spoke with Jürgen Klopp at the time and he is really a Liverpool fan. It would be the best option for him and for the club,” Mulumbu added.
There is a history behind that suggestion. Mbappé has previously revealed that he came close to joining Liverpool while he was playing for Monaco in 2016, before deciding to move to PSG.
In an interview with The Athletic in September 2026, the France captain explained that his mother, Fayza Lamari, had favoured a move to Anfield and had travelled to Liverpool during the negotiations.
“Yes, I was close to Liverpool. My mum was a big admirer of Jürgen Klopp and Liverpool was her favourite destination. She wanted me to go there,” Mbappé said.
Lamari was impressed by the club after visiting the city and stadium, while Mbappé also recalled meeting Klopp during the discussions. The German manager presented his plans to the young forward during a conversation aboard a private plane.
Mbappé ultimately chose PSG, explaining that he wanted to remain in his home city and establish himself in Paris before moving abroad. He joined the French club initially on loan from Monaco before completing a permanent transfer.
That missed opportunity has since become part of the story linking him with Liverpool, but it does not amount to evidence of a future transfer. Mulumbu's prediction remains speculation, with Mbappé still playing for Real Madrid and no departure currently indicated.