Many of us learned from the mistakes back then, we really didn't expect the downfall after reaching the ath in 2017. So right now, it's better to play safely in the market, you might lose a lot if made a mistake for not trading it. I have similar mistakes in the bull run 2017, that's why I'm applying it right now, it's better not to be greedy. If we know that we already gained a lot, doubled or tripled, it's time to assure your profit, don't wait for an unexpected downfall.
the question that must be considered too, will the events of 2017 be the same as what is happening now? If indeed it is the same, then I agree with your opinion to remain careful and analyze well and if you feel that you have enough, do not delay in letting go because the benefits that should be obtained will be reversed.
but because we know that the halving event will occur a year later, the end of this year is not the final goal of increasing bitcoin so there's no need to worry, because renewable ATH will occur in 2021.
all of this can be wrong predictions, it is also good to keep preparing, lest you experience being depressed because of greed what our friends say. always on guard is something that is very important is also necessary.