I think he understands that he's not going to be able to perform as he did in his prime for the bigger clubs. So he will surely sacrifice a little bit of salary if he wants to stay. But at the same time, if he does actually understand that he will not perform well for the bigger clubs, I believe he should move to lower-tier clubs. In that way, he will still be able to get paid handsomely and he will also not have to worry about being the second pick for the team. And I believe he should choose the second option.
Romelu Lukaku is a strong player and anyone knows this but during this season he was just not lucky enough while he could perform well because of the injuries he had Lautaro Martinez and Edin Dzeko both performed very well and they were both covering lukaku's position in the team they scored 13 and 7 goals during this season in Serie A while Lukaku could only score two goals, so maybe that the time for Lukaku to leave Inter Milan soon.