Maybe they think bitcoin is not good to invest at this moment because the price is not stable and they have chance to decrease more. But in my opinion better to invest because once the price increase again it will increase very high if many people buy . It depends to the people what they think.
Anything is possible with a market situation and it is impossible to predict what the future holds in any market and advising people not to invest in it at this time is not the best advice you can give to anyone as there is no substance in it rather than just speculation, people were skeptical when the price was touching thousand dollars and it happened and now people are more skeptical but the market will move on.