Antonyms for the phrase "betting bottom dollar on" could include being unsure or uncertain about something, hesitating to commit fully, or not having confidence in the outcome. Other antonyms might include being skeptical or doubtful, holding back or refraining from putting full faith and trust in a situation or person, or simply avoiding any significant risk or potential loss. When faced with situations that require decision-making or putting one's resources on the line, considering various antonyms for "betting bottom dollar on" can help individuals make more informed and well-thought-out choices.