Before your first spin, no result is promised
Deciding to spin Idol Pop Fever means accepting that the bonus round comes without a timetable. How often it arrives is not known in advance. The result of one session is random whatever the RTP version, so two sessions on the same bet can end far apart. The RTP is an average over a very long run, so it says nothing firm about one session.
Choosing a version starts with one question: which RTP does Crazyluck Casino run for this game? That answer appears only in the game rules, not on the reels. Read the rules before the first spin, because the four versions are close, yet the rules are the only place that names the one in use.
Planning around the top prize means treating it as a ceiling, not as an expected result. The maximum win of Idol Pop Fever is x5,000 of the bet, and a session reaches that ceiling very rarely. Raising the bet raises the money won at that multiple, not the chance of reaching it.