If it is not a dream caused by watching a movie, it should be a dream caused by work pressure.
Giant probably has two meanings.
1, the giant represents the company leader. This dream means to give you some important tasks.
2, the giant represents the customer, this dream means that the customer is dissatisfied with you. You can review your previous work and get ready.
I don't know what a sickle with a chain means, and I don't know if it has anything to do with your work.