You aren't thinking of half of the factors here.
1.) Your account is 100% different from everyone elses.
2.) Each Bot client is different and you should choose your own, but I'm pretty sure there aren't public staking scripts. There might be so shoot maybe look around.
3.) You can never have an expected amount to win in each day because each stake is different, there's different odds per each stake.
What if you get banned on the bot? There goes all your money you want to stake with.
What if you only leave it with 20m? You can't make much off that