Random timing and one session's result
Deciding how long to stay on Big Bass Reel Repeat means accepting that the bonus round may come early, late or not at all. Nobody can say in advance how often the Free Spins round arrives, and the result of one session stays random whatever the RTP is. The RTP figure describes averages over very many rounds, not the next spin you play.
Before you bet, check which RTP version the game runs, because Picklebet Casino shows it only in the game rules. Open the rules before your first spin and read the figure there yourself. Other titles in the Big Bass series use different RTP values, so do not assume a match.
Choosing how much to stake should not hinge on the top prize, since the maximum win of Big Bass Reel Repeat is a ceiling reached very rarely. The cap sits at x5,000 of the bet, which makes A$50,000 at the example bet of A$10. Treat it as a limit on the game, not as a target.