This design draws inspiration from Japanese hannya masks, traditionally used to portray vengeful female demons. As a follower of Bitcoin-sama, this fancard’s design element reflects Bitcoin-sama’s Japanese origin and her feminine revolutionary spirit.

This fanclub uniform combines both traditional Japanese elements and contemporary designs (和洋折衷: わようせっちゅう). It echoes Bitcoin-sama and is emblazoned with characters referencing cryptography, a revolutionary technology that is already changing the world.

This sword is adorned with a tag referencing SHA-256, a cryptographic hashing technology that enables many cryptocurrencies and blockchains. Just as Bitcoin-sama’s sword symbolizes revolutionary power, this fancard’s sword references the power of cryptographic hashing.

A “zero-knowledge proof” is a system where a prover can prove to someone else whether something is true without giving away any additional information. In this analogy of two paths, there is a secret door, represented by the big X, blocking the two paths from each other. Someone who knows the secret to opening the door can prove that they know the secret by being able to circle around starting at either path, and they can demonstrate that without giving away the secret to opening the door.

A blockchain is essentially a group of computers working together that have to agree with each other. A 51% Attack is when one party takes control of 51% of the computing power of a blockchain, so they can control the majority of “votes” to break the rules of the blockchain and prevent others from correcting them.

The Byzantine Generals Problem is an analogy where a group of generals is attacking a fortress and they can only win if they all attack or they all retreat, so the generals vote on what move to make. Unfortunately, some of the generals are traitors that may or may not send a misleading vote to the other generals. A blockchain, like the generals, is made up of independent nodes that have to come to agreement, and the rules have to make sure that the chain works even with unreliable “bad general” nodes.

A “whale” in crypto is a person or group of people that owns a significant amount of tokens of a cryptocurrency. For instance, a bitcoin whale could have thousands of bitcoins. For many blockchains, whales dictate the market trends of the chain’s currency and may also shape the chain’s applications and ecosystem.