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Most times it's just better you maintain some privacy because it hard to trust people these days besides most people here in Nigeria are brainwashed that all people that are into cryptocurrency especially Bitcoin are fraudsters, they know little of the world of bitcoin so they can say shit about it and you announcing yourself as a Bitcoiner can make the situation worse.. they aren't gonna believe you but try changing your mode of dressing too
Better explanation is going to make them believe you bro.It is good to assume,but when better explanation comes,there is every tendency that they will believe you.
In other to do this,you must have a private conversation with the person's that is doubting you,try to show him prove of what you do,do your thing and show him,he will know that you aren't into fraud,or will you sit and look at someone spoil your name when you know clearly what you are doing that you are doing a direct job that can pay you.Better explanation can save you.