'zib' seems a bit weird because it's new; any made-up word faces that at first.

But made-up words also come with no meaning-collisions – they can mean precisely what is chosen – and become familiar after a few exposures.

'bit' is always going to create comprehension/abbreviation/search problems, as people try to move between the different senses. (And since the bit-as-binary-digit is the core of the Bitcoin system – the binary math that gives the currency its scarcity and security – everyone who ever tries to become a Bitcoin expert will face these clashing terms.)