I think the difference between now and then is that more people are already aware of btc because it's all over the news when it was pumping last december. And people also had a first hand glimpse of how volatile the market can be with the correction. Curiosity isn't going to be the same as 2014 or 2015 and people who don't research and just listen to the news will be wary of making investments.
It should even be easy now with some of the news trending on bitcoin which should give any investor who already bought the peak to easily hold and buy more believing in its future. However, I have notices that people tend to pay more attention to FUD and miss buying the dip, and when the FOMO starts, they jump in front of a moving train and then they keep the cycle going. Hopefully, next time people will realize why it is important to have a nice and steady uptrend than an unwarranted bull run.