There is no doubt that for Zhou Tian, proving his own value is quite easy.
Whether in terms of strength or influence, Zhou Tian is by no means weaker than most True Gods, and proving his ability now is not difficult. For Zhou Tian, what he needs to do at the moment is merely to prove how much his existence can help that Divine King. Only by proving that his existence can assist the other party will that Divine King value Zhou Tian and willingly deepen his relationship with him.
Undoubtedly, the simplest and most direct method for Zhou Tian to prove that point was, of course, to throw money.
Honestly speaking, although the profits of a Divine King are certainly greater than those of a True God, generally speaking, even if the assets of hundreds or thousands of True Gods were combined, they probably couldn't compare to a single Divine King.
However…
