Hey there, just came across your story while browsing. Not sure what the history is, so feel free to ignore this, but you might want to consider, to align a bit more with the English title, something like "Dono sekai demo okane wa chikara" with optional 'de aru' (older/more elegant/storytelling) or 'da' (younger/energetic/emphatic) at the end depending on the tone and phrasing you want to get across.
Good luck with your novel! I'll have a read when I get a chance!