Check the game rules for the RTP version
Choosing your stake is the first decision, and it does not change when the bonus round arrives. How often that round comes is not known in advance. Each spin is random, and the result of one session is random whatever the RTP. A session can run long without a bonus, and it can end early.
Before you start, check which RTP version runs on this game. That detail is shown only in the game rules, so open them before you play. Treat the rules as the reference for every figure on this page.
Before you set your sights on the top prize, remember that the maximum win of Vampy Party is a ceiling reached very rarely. Hitting it is not a target to plan around. Treat the maximum as the limit the game can pay, not as an outcome you should expect in any session.