Maybe he's from a society where Bitcoin is restricted from it citizens a place where there's tough regulations by the government and citizens who secretly use it have to be careful not to attract the authorities, for instance the past administration of my country restricted the use of Bitcoin and other coins at large so we were very careful cause most the security authorities who were delusional took it personal and would immediately tag one for fraud if caught.

 However I don't think it's a nice idea for him to generalise since there are countries where the regulations ain't tough and people freely use Bitcoin for different use case, what he should've said is that people should protect themselves from potential robbery by not exposing the amount they're worth to the strange people or sometimes even close neighbours, these are tough times and lazy people who can't invest or hodl Bitcoin could easily plot with kidnappers and steal your coin, it would've been very understandable if he had explained it that way.

 In other words, one can spread the aware of Bitcoin and it's important, with specific reason of why it's good for people to hodl it including the benefits they stand to gain in future but avoid letting them know what she or he is worth in Bitcoin, for security reasons.