Some people just don't care about BTC, so why should you care that they don't. I don't know what your message here is, but everybody can't be interested in using BTC, so many people are comfortable using only fiat and having the bank 'take care' of their money, they do not want to have some of that responsibility, and that's okay.

I believe that whenever a person is looking for a second choice currency to their fiat currency, they will become interested in BTC, but until then.