I'm on the working group. There are lots of options for units to go with an ISO 4217 currency code. Would XBT = 100M satoshis (1 bitcoin) be better than XBI = 100 satoshis (1 bit)?
If XBT = 1 bitcoin, I don't foresee people writing 0.00098 XBT to describe the cost of bubblegum. People _might_ write 980 XBI though.
I certainly feel that XBT for 1 bitcoin is a better choice than XBI for 1 bit, mainly because the term "bitcoin" is far better established (one can even look it up in the dictionary). Currency codes are very much a realm for formality, accuracy, unambiguity, and stability; XBI for one "bit" is simply not appropriate today given the youth and contention surrounding the term. If the 100-satoshi unit is desired (e.g. for decimal point-related issues) and the working group wants to push this now then I think the only appropriate term to build around is "microbitcoin". This is not the end of the world (The formal UK currency name is the cumbersome "Pound sterling" yet, GBP works and people get by with slang such as "pounds" or "quid" in everyday situations).
People are unlikely to write "0.000 98 XBT" or "980 XBI" in my opinion but they may well write "980 bits".
I think we need more community input on this choice. Can we get two currency codes? Doubtful, but is worth discussing.
Just in case the working group hasn't seen it, here's an
Old, short, Bitcoin Foundation discussion on the topic.
Another related idea that I think needs community input is getting a Unicode currency symbol(s). We are all used to using BTC for bitcoin and some are starting to use ƀ for bits...unfortunately, a capital ƀ is Ƀ, which is also used for 1 bitcoin. Nothing like a capitalization error to cost you 1 million times more than you wanted to spend!
Should we try to get Unicode characters for 1 bitcoin and 1 bit? Just bits? Just bitcoin?
A benefit of using 1 bitcoin as a standard is that the symbol µ is separately encoded in Unicode from the Greek letter μ (which case folds to the Greek letter Μ).
Therefore, 1 µXBT and 1 µBTC shouldn't accidentally change value at the whim of a shift key.
I quite like the µ
BTC idea.
Another thought: Perhaps a "µ" with a bar through it, "
µ" say, would be easier to get given that "₥" for a
mill already exists and is currency agnostic. I could certainly see prices like "1500
µ" (or "
µ1500") being commonly read as "fifteen hundred bits" but also sometimes "fifteen hundred mikes" or "one point five mills".
I feel worth stressing a second time is that, given the current upset surrounding the 100-satoshi term, it might be wise to simply work on a currency code for the "bitcoin" unit for now, leaving the issue of the smaller unit to settle for a few years.
Disclaimer: While I've honestly tried to be unbiased and logical, it's no secret that I openly oppose the term "bit" for 100 satoshis.