Symbol: BTC. Bitcoin is the first cryptocurrency that 

  1. runs on a global peer to peer network, 
  2. is decentralised (no single entity can control it), 
  3. it’s open source (wallet & transaction verification), 
  4. it is bypassing middlemen or central authority, 
  5. with no issuer or acquirer, 
  6. anyone with a computer or smartphone can use it.