Some popular cryptocurrencies to invest in other than Bitcoin include:

1. **Ethereum

**: A leader in smart contracts and decentralized applications.

2. **Binance Coin ($BNB )**: The token of the main crypto exchange that is also used in the Binance Smart Chain ecosystem.

3. **Cardano ($ADA )**: A promising platform with a focus on security and scalability.

4. **Solana ($SOL ): Known for its fast transaction speeds and low fees.

5. **Polkadot (DOT)**: Allows interoperability between different blockchains, making it a promising option.

6. **Chainlink (LINK)**: Focused on integrating data from the outside world into smart contracts.

Each of these currencies has its own risks and opportunities, so it is important to conduct careful analysis before investing.