What is so interesting in life as an average person? Let's say we all average people always have a monotonous life?

We always do the same thing. No matter what we do, it will always be the same. E.g. Work 5 times a week afterwards, eat or drink at home, play PC or Playstation, watch TV or do sports. At the weekend you can meet friends or families or just chill at home.
otherwise it's always the same, really, that's such a monotonous life. You can change anything, you can change your job, whatever you come up with. The only thing that would be so that you don't have a monotonous life you have to have a lot of money that you can never spend. Then you can really enjoy life.

No. Money does not help out of the "monotonous life". The only thing that matters and what makes life interesting are personal relationships. Friends family. I mean real friends. And these are more difficult to find with a lot of money, i.e. With a rather average income.

You can enjoy life like that too. The secret is just that you are grateful and happy for what you have. You can certainly have dreams, but an average life can also be exciting and happy.

Well if you don't want to be an average citizen then see that you get more money. Study something that interests you and meet new people. Your personality will develop with your studies. Try out new hobbies. The sense is to be the best version of yourself and to discover and live out your passion with someone you love and who takes you for who you are. You have to get to know many new people and broaden your horizons. And travel is also important. But that works best when, as I said, you go to university and earn so much money and start your own business. You have to find a job that is fun and that makes money so you can best enjoy life.

It's just up to you to bring more life into your everyday life. Even the little joys can be great fun. An unexpected meeting, a nice "thank you", a fine meal, good and interesting conversations… And sooo much more. And all of this is possible without a lot of money.