Cryptocurrency Crossword

1234567
Across
  1. 6. A system that many cryptocurrencies use, and requires massive amounts of computing power to verify transactions
  2. 7. The sharp downturn in the economy during the late 2000's that inspired the creation of bitcoin
Down
  1. 1. original block in blockchain
  2. 2. Any form of digital currency that uses a decentralized system to record and secure transactions
  3. 3. A system that certain cryptocurrencies use, requires significantly less electricity that proof of stake
  4. 4. Creator of bitcoin
  5. 5. First cryptocurrency, created by Satoshi Nakamoto