Bitcoin Rock #1 – “A Peer-to-Peer Electronic Cash System” 
Bitcoin Rock #2 – “a solution to the double-spending problem” 
Bitcoin Rock #3 – “an ongoing chain of hash-based proof-of-work” 
Bitcoin Rock #4 – “a record that cannot be changed” 
Bitcoin Rock #5 – “robust in its unstructured simplicity” 
Bitcoin Rock #6 – “majority of CPU power is controlled by honest nodes” 
Bitcoin Rock #7 – “generate the longest chain and outpace attackers” 
Bitcoin Rock #8 – “nodes can leave and rejoin the network at will” 
Bitcoin Rock #9 – “cryptographic proof instead of trust” 
Bitcoin Rock #10 – “transact directly with each other” 
Bitcoin Rock #11 – “without the need for a trusted third party” 
Bitcoin Rock #12 – “always consider the longest chain to be the correct one” 
Bitcoin Rock #13 – “an incentive for nodes to support the network” 
Bitcoin Rock #14 – “transactions must be publicly announced” 
Bitcoin Rock #15 – “rules and incentives can be enforced” 
Bitcoin Rock #16 – “work all at once with little coordination” 
Bitcoin Rock #17 – “keeping public keys anonymous” 
Bitcoin Rock #18 – “computational proof of the chronological order of transactions” 
Bitcoin Rock #19 – “Consensus Mechanism” 
Bitcoin Rock #20 – “If they are generated too fast, the difficulty increases” 
Bitcoin Rock #21 – “the first transaction in a block is a special transaction”
Bitcoin rocks 