Maybe they are just scared old grumps out there thinking that they might lose their money if Bitcoin suddenly dump. Maybe they also think that their decision has been justified especially when they see current bearish situation happened on Bitcoin.
Not everybody will invest in Bitcoin; in the same way, not everybody will invest in gold or real estate or buy the shares of a particular company. There is no need to call people who don't want to invest in bitcoin names, they all have the reason whether it's fear or any other reason.
When you put yourself in other people's shoes, you'll better understand their decisions.
Imagine you're part of the team that's responsible for investments in a company and you're faced with a decision to invest customers' or shareholder's money in bitcoin knowing the risks involved. If it goes well everybody is happy, but if it doesn't, the company takes a hit and that's on you, not the people that advice you to go into the investment.
There are other ways to maximize profit and they have followed those route and taking the risk, if they decide against bitcoin, they have committed no crime against bitcoin.