Possible meanings are 1) Jesus uses hyperbole when he calls money "unrighteous" because it has no eternal value. Alternate translation: "by using money, which has no eternal value" or "by using worldly money" or 2) Jesus uses metonymy when he calls money "unrighteous" because people sometimes earn it or use it in unrighteous ways. Alternate translation: "by using even money that you earned dishonestly" (See: [[rc://en/ta/man/translate/figs-metonymy]] and [[rc://en/ta/man/translate/figs-hyperbole]])