1. Bitcoin (BTC): It is considered the first and most famous digital currency, and is used as a means of exchange and as a store of value.
2. Ethereum (ETH): A platform that allows the creation of smart contracts and decentralized applications, and is the second largest currency in terms of market value.
3. Terra (Tether - USDT): A stablecoin pegged to the value of the US dollar, and widely used in trading.
4. Binance Coin (BNB): The native currency of the Binance platform, used to reduce fees on the platform.
5. Cardano (ADA): A platform focused on developing smart contracts and providing new solutions in the blockchain space.
6. Solana (SOL): Known for its high transaction speed and low costs, making it attractive to developers.
7. Ripple (XRP): Focuses on facilitating international payments and money transfers.
The popularity of cryptocurrencies changes over time, so it is best to follow the news and developments in this field.