Bad money drives out good.
Bad money drives out good.
In the worst case, I will have to pay that.
Virtue will triumph over vice in the end.
You must beware of that man―take heed of that man―guard against that man―(他動詞構文にすれば)―I must warn you against that man―caution you against that man―put you on your guard against that man.
Take my advice, and give up the idea!