It was a gamble that in the end did not pay off to what he had hoped.
Financially it was a good decision, but from a sporting decision oh boy it was not great. He got butchered quite a bit in France which led to him getting some bad and lengthy injuries which forced him out of the idea he could win the Ballon D'or even though PSG made the final they still lost to Bayern and also lost to City this year.
It will be one of those debates people will be talking about for years. His move to PSG was it really worth it in the end despite the bags of money he earned? For me the answer is fuck no, it's like he decided to take out a gun and shoot himself in the leg for no reason.