Satoshi Nakamoto

Vitalik Buterin

Craig Wright

Hal Finney

To enable a peer-to-peer electronic cash system without a financial institution.

To establish a centralized database for global transactions.

To replace all government-issued currencies.

To create a digital asset for speculative investment.

Only the original creator of a block can change its contents.

The data on the blockchain is anonymous and cannot be viewed.

Once data is recorded on the blockchain, it is extremely difficult to change or remove.

The blockchain can be easily modified by any participant.

Through a central authority that validates all transactions.

By encrypting all data so only certain parties can read it.

Through a consensus mechanism where participants agree on the state of the ledger.

To prove ownership of a Bitcoin wallet.

To generate new public and private keys for users.

To speed up transaction confirmation times.

To make the creation of new blocks difficult and resource-intensive, thus securing the network.

The reward for mining a new block is reduced by 50%.

Transaction fees are doubled to compensate miners.

The total supply of Bitcoin is cut in half.

The difficulty of mining is permanently halved.

Unified Transfer Exchange Order

Universal Transaction Output

Underlying Taxable Object

Unspent Transaction Output

A hardware wallet.

An exchange wallet where a third party holds your keys.

A desktop software wallet on a personal computer.

A mobile software wallet on a smartphone.

Private keys.

Bitcoin address.

Public keys.

Transaction history.

A malicious actor spends the same bitcoins in two different transactions.

A user accidentally sends the same transaction twice.

Paying double the required transaction fee to get faster confirmation.

Limited and predictable supply.

Acceptance by all merchants globally.

Support from central banks.

High transaction speed.

False

True

To increase the total supply of Bitcoin.

To decrease the amount of electricity used by the network.

To ensure miners are always profitable.

To maintain an average block creation time of about 10 minutes.

It is backed by governments, making it a stable option for savings.

It allows anyone with an internet connection to access financial services without needing a traditional bank account.

It offers high-interest savings accounts managed by the network.