Bitcoin symbol

There is no official Bitcoin symbol as of December 2010, however the BTC abbreviation is the most universally accepted form.

Unicode symbol

There is a discussion over which Unicode symbol might be the best suited for bitcoin.

It has lead to the following options:

• ฿
  • Pro: Gives a currency-like look (it is the symbol for an existing currency, the Thai Baht, but other currency symbols often get reused, like the $); displayed correctly on all known OSes
  • Cons: It is already used for the Thai currency, and might confuse people
• Ⓑ
• ⓑ
  • How to easily type the circled B symbol on a Mac
  • Cons: Does not display properly for everyone
• ᴃ
• Ƀ
• B⃦
• ␢
• β
• ¤
• Ƅ
• ∄
• ℬ
• ઘ
  • Cons: No visible relation to Bitcoin
• ϭ
  • Cons: No visible relation to Bitcoin
• 
  • Cons: Does not exist in the Unicode standard
• 
  • Cons: Does not exist in the Unicode standard
• ⓢ
• the b'at
  • Pros: Is round like a coin. Contains the B for Bitcoin. Borrows a style widelly associated with the internet. Not used for other meanings.
  • Cons: Not (yet) officially in the Unicode standard.
• A C with 1 and zero inside [[1]]
• A C with a circle and dot inside [[2]]
• ◪

• ☃
  • Cons: Wait, what?

Reference

How to type Unicode characters in Microsoft Windows