Antonyms for the phrase "bide time" would be to seize the moment or take action immediately. The phrase "bide time" means to wait patiently for the right moment and not rush into things. However, sometimes it is necessary to take action quickly and not wait around. It is important to weigh the risks and benefits of waiting versus acting swiftly, but sometimes waiting can lead to missed opportunities. So, instead of biding time, sometimes it is best to be proactive and take action to achieve our goals. This can lead to a better outcome and prevent regret in the future.