If I want to generate the most money from my traditional & roth IRA accounts - where should I "park" it for the next 20 years?

Currently traditional IRA has $30,000 and roth IRA has $17,000 both with Charles Schwab

Let's assume I don't contribute anything more to either of these accounts for the next 20 years. Currently I have them parked 100% in VOO. Is there something better? Hypothetically (I know nobody can possibly know for sure), with the accounts I currently have, if I do no additional contributions to them for the next 20 years - how much wold the accounts have if I keep them both with VOO?