Amorim is safe. I think 99.9% he will be coaching Manchester United next season as I suppose that was part of the whole process to sign and convince him. They guaranteed him to have time to build this new team, which is now bad and no expectations were precisely agreed upon. I can't remember, but do you happen to know whether Amorim made some big promises at his first press conference or said something like what they are going to achieve this season?
If I am not mistaken, I think he was carefully choosing his words and was rather holding back and emphasizing that this has to be considered a long term project.
Now with this shot for the EL title, he can win more, and this is what is so ridiculous, than the club could ever dream of when they signed Amorim. Big title + CL qualification.

Nobody in his right mind would have believed Amorim if at his first press conference he said: "we will finish this season with a big title and the CL qualification". Think about that, everybody would have been shaking their heads. It's unreal how they can now finish this season, same for Tottenham obviously.
You're right about that, that's why this team has also done things that we didn't think they would achieve, for me Amorim is a very good player, but there's something missing , what they should focus on is winning the Europa League, it's time to see a MU in the UCL singing with the best in Europe , I know they dream of that place, they have to Achieve it , of course it's not to discredit Spurs but Spurs will play with the need too.