From the RTP figure to the spins ahead
Decide how much of your balance to spend before the first spin because nobody can know in advance how often the bonus round arrives. The result of one session is random, whatever the RTP. The RTP describes the average return over a very large number of rounds, not what one session will return. A session can end with no bonus round at all.
Check the RTP version before you play, because the version running at Betbolt Casino is shown only in the game rules. The table on this page shows what each version returns on A$100 staked. Compare the two versions there, then open the rules for the one you will play.
Treat the maximum win as a ceiling that very few rounds reach, not as a target to plan around. The table shows the top prize in money at the top example bet. Whether any round reaches it cannot be predicted before you play, so set your stake before the first spin.