I actually don't think it's outrageous, considering that he only turns 23 in August and will almost certainly be hotly contested by several clubs. He's an incredible player; reminds me a lot of Hazard, especially the version of Hazard at Lille. Nainggolan is just an unreal player; in my opinion Chelsea can lack goalscoring from central midfield. It's definitely a short term option as he'll be 29 in May, but I can't think of a player in the world with fewer weaknesses. He'd be perfect next to Kante.