I think a lot of reputable news outlets are reporting Real buys him then loans back to monaco.
Honestly though, he should stay at monaco for 3-4 years. A lot of these young players get massive heads and go for these extraordinary transfers and do sweet ■■■■ all. Renato Sanches at bayern is one.
But it looks like the premier league top 6 are going all out to bolster their team (except arsenal).
I'd personally be ecstatic if we ended up with lindeloff, morato, fabinho and matic.