Read the rules before you trust an RTP
Set your session budget before the first spin. How often the bonus round comes is not known in advance, and the result of one session is random whatever the RTP. A short run can end well below the stake, and a long one can end above it. Neither result says what the next spin will pay.
Open the game rules before you decide how much to stake, because the RTP version this site runs is shown only there. Confirm which version you are playing before you deposit, and do not rely on the name of the game alone.
Treat the maximum win as a ceiling, not as a result to expect. Mustang Gold reaches that ceiling very rarely, so size each stake for the losses you can accept. A high ceiling does not change how a typical session runs.