I've updated the currency list in my Save old Cars shopping cart, and I've managed to include a glyph for Bitcoin. I've also added Satoshi as an alternative currency, but I can't find any concencus on a glyph to use as the currency symbol, so I'm having to use the string "SAT". Is there likely to be any agreement for a glyph in the near future?

I quite like the symbol suggested by satsymbol.com, as it is close to the chinese character meaning bountiful.

丰 Reminiscent of the Japanese aesthetic, the closest character being 丰 meaning: "Bountiful - abundant, lush, bountiful, plenty, luxurious growth of grass" which suggests a vast amount of Satoshi are still left to mine. This symbol has been adopted by multiple Bitcoin services including satoshilabs.com (Trezor), SatoshiCap.net, pricedinbitcoin21.com, Thunderhub.io, bitcoinicons.com, thebitcoinmachines.com, and many more

里   In Japanese names, this character can (rarely) be read "satoshi". It is an uncommon Chinese/Japanese character on its own, and an infrequent radical (kangxi #166). It can be seen as a radical in the common kanji 理 and 量, used in meaningful words like 理想 (ideals), 理論 (theory), 理性 (reason), 理科 (science), and 量 (quantity). "Satoshi" is a rare reading; more commonly it is read as "ri" or "sato".

シ   A Japanese katakana representing the syllable "shi". Note that this character is extremely common in Japanese, so it could cause confusion. Also, it can mean "death" in Japanese and Chinese.

㋛   As above, but circled to distinguish it from the katakana.

し   As above, but this is the hiragana instead of the katakana. This is even more common than シ in Japanese writing, however.

サ     A Japanese katakana represents the syllable "sa". Maybe it looks more reminiscent of a currency symbol than others. Note that this character is extremely common in Japanese, so it could cause confusion.

Bitcoin Design (Units and Symbols)
Satoshi (unit). It has a table of some proposed symbols but I don't like any of them.

sat is like a under capitalized version of SAT  

1 sat equals 0.1 nBTC.

I think it will get too complex to use milli- or pico- as prefixes to the Bitcoin logo. I'm just going to have to stay with "SAT" until there is a new standard. I don't think that I'll be adding any alts, but I mauy have to add the new CBDC when it arrives. I'm tempted to include gold or silver, but I guess that would mean sovereigns.

1 sat equals 10 nBTC. It is uncommon to use nBTC.

I think it will get too complex to use milli- or pico- as prefixes to the Bitcoin logo. I'm just going to have to stay with "SAT" until there is a new standard. I don't think that I'll be adding any alts, but I mauy have to add the new CBDC when it arrives. I'm tempted to include gold or silver, but I guess that would mean sovereigns.

Or "Bitcoin Sats": BTC$ I couldn't find an ascii $ with 2 vertical lines, that would be even better.

I've had some further thoughts on this, especially in relation to Sterling. If I want to list an item for 5 pounds, then I can print £5, but if it is only 5 pence, then I can list it as 5p. I'm going to adopt the same concept with Satoshi. ie. 50 Satoshi will be 50s. I'm hoping that this won't appear similar to 505 in some fonts.

If you guys want to  see how this works, then you can check the currency button in the top right hand corner of the cart home page -
The Save old Cars cart with Bitcoin and Satoshi payment options