It's a cool symbol, but the one @vinney...axkl is using is easier to write. I like that one more.
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It also has the advantage of being in the available unicode set on most machines (because it's a symbol for the Thai Baht, which curiously is divided into 100 "satang"...)
The original ₿ started off as an appropriation of the ฿ until a proposal was accepted to add ₿ to unicode: 
So we'd just be repeating this process for the lowercase for sats :)
Thai baht - Wikipedia
🤔 maybe Satoshi was/is Thai... No one ever suspects the Thai... Historically friendly with Japan, too. Hmm. Hmmmmmm 🤔