The Earth was given to Satan, our redemption it the acceptance of Christ as the Savior.
Yes we can fight, but the outcome is inevitable.
Satan wasn’t Satan when the earth was first given to him.
Hell is the only irrevocable chattel of Satan. The earth is a battle ground, and things in it need not be yielded to Satan, though weak Christians often cede it as a result of overly wooden theology. Think: if the earth were entirely Satan’s, there would not be any healings. It only “belongs to Satan” in a relative sense. The New Testament term “world” is more closely aligned with what Satan actually does rule.
Let me put it more boldly: you are afraid to claim Christ’s conquering power. Friends we make with the mammon of unrighteousness WILL greet us in heavenly dwellings. The ephemeral stuff will go away, but that’s not what is important.