You Just have to learn how to ignore those people. I don't think there is someone who hates Bitcoin.
They either lost some money there or "Bank" Got the form of a human and is roasting bitcoin.
which I highly doubt.
So if you find someone like that and even when you explain they don't understand. Just move on
Then what makes you different from them, if you're just going to be as arrogant and ignorant as those people?
What's wrong in being advocate, maybe you're not explaining it clearly to them, don't blame them immediately. Because maybe you're the one who's lacking in communication skills, or not persuasive and charismatic at all.
Don't solely blame them, just because they don't know or they have other ideas about cryptocurrencies.