Blockchain coins, also known as cryptocurrencies, are digital assets that use blockchain technology to secure transactions, control the creation of new units, and verify transfers. Some of the most notable blockchain coins include:

1. Bitcoin (BTC): The first and most well-known cryptocurrency, Bitcoin operates on a decentralized blockchain and serves as a digital store of value.

2. Ethereum (ETH): Ethereum introduced the concept of smart contracts, allowing developers to build decentralized applications (dApps) on its blockchain.

3. Binance Coin (BNB): Initially launched to support Binance exchange transactions, BNB now powers the Binance Smart Chain, used for decentralized finance (DeFi) applications.

4. Solana (SOL): Known for its high-speed and low-cost transactions, Solana has become a popular choice for decentralized apps and DeFi platforms.

5. Ripple (XRP): XRP is a digital currency designed for fast, low-cost international money transfers, often used by financial institutions.

6. Polkadot (DOT): Polkadot enables different blockchains to transfer messages and data in a trustless way, focusing on interoperability.

7. Cardano (ADA): A proof-of-stake blockchain platform aimed at providing a more secure and scalable platform for the development of dApps and smart contracts.

These are just a few examples among thousands of cryptocurrencies, many of which have unique use cases and underlying technologies  .