and as for klabaki's trademark 'zib', a few have already worked out that its not so 'unrecognised' and 'unused' as he first thought
As currency
Ƶ was sometimes used instead of Z to represent the zaire, a former currency of the Democratic Republic of Congo.
Ƶ is used as a currency symbol in the video game EVE Online to represent the in-game currency Interstellar Kredits (ISK).
Also, the popular British TV show Doctor Who uses ƶ as the symbol for the unit of money, Galactic Credits
'Zib' is no-one's trademark: not registered, not common-law.
Its first use in this context was
my proposal and creation of the
https://zibcoin.org site. It's a generic newly-coined word for 'microbitcoin', equally open to all, and as the coiner of the term, I'd fight anyone's attempt to trademark it. The word 'zib' has not been used before for money.
'Zib' can't be easily confused with 'bitcoin' or 'digital bit', directly or as abbreviations ('millibit', 'microbit', 'b'). It will always mean just one amount, 100 satoshis.
If people want to use the words, 'zib' can be combined with the metric-multiplier prefixes - kilozib for 100,000 satoshis, megazib for 100,000,000 satoshis - avoiding the same confusion that would happen with 'kilobit' and 'megabit'.
The 'Ƶ' (Z-with-stroke) symbol
has been used for real currencies in the past, or for fake currencies in science-fiction. But so has the '฿' (for thai baht) that's already used and useful for Bitcoin. So multiple past usages for 'Ƶ' (Z-with-stroke) just ensure that (a) it can't be monopolized; and (b) it's naturally understandable as meaning 'advanced future money'.
Sure, 'zib' is unfamiliar like any newly-coined word would be, and it's tempting to just pick something cute and familiar (like 'bit') even if risks long-term confusion. Newer words are hard at first, it's OK not to like it. But please be honest about it!