We need to come up with a lot of tasks

for example, I have accumulated $5,000,000, it’s getting boring, I’ve debugged the whole business, bought everything I wanted, there’s nothing else to do. And if along the way I met the task of creating a supermarket chain that generates income in the amount of a certain amount, or, for example, to build shops all over the street with my brand, it would be more fun. I believe that missions delay players in the game and they are needed
And I also propose to introduce mining. Cryptocurrency Trading

Closing this as complete as the objectives/tasks have expanded greatly since this post was made, and will continue to expand as the game develops.

Also the Crypto suggest exists here:
A cryptocurrency mining system - Feature Suggestions - Big Ambitions Community (bigambitionsgame.com)