The phrase "bets bottom dollar on" implies a strong belief or conviction about something. However, if we were to consider antonyms for this phrase, we might come up with several options. For instance, "doesn't trust at all" or "has serious doubts about" might be antonyms for someone who bets their bottom dollar on something. Alternatively, "feels indifferent towards" or "doesn't care about" could also be antonyms of this phrase. Ultimately, the antonyms for "bets bottom dollar on" would depend on the context and the intent behind the original phrase. Regardless, considering antonyms allows us to broaden our understanding and think critically about language use.