Predicting which cryptocurrency will become a top 10 coin after Bitcoin is speculative, as the market is highly volatile. However, based on current trends, technological innovation, community support, and partnerships, here are a few promising projects that have the potential to rise or remain among the top:

1. **Ethereum (ETH)** – The second-largest cryptocurrency by market cap. Its smart contract functionality powers a vast array of decentralized applications (dApps) and DeFi projects.

2. **BNB (Binance Coin)** – Binance’s native token, used for transaction fees, staking, and powering its BNB Smart Chain. Its utility continues to grow with the Binance ecosystem.

3. **Cardano (ADA)** – Known for its research-driven approach and sustainability, Cardano focuses on scalability and smart contracts with its Ouroboros consensus protocol.

4. **Solana (SOL)** – A high-performance blockchain known for its fast transaction speeds and low fees, Solana has attracted significant interest in DeFi and NFT spaces.

5. **Polkadot (DOT)** – A project aiming to enhance blockchain interoperability, allowing different blockchains to communicate and work together.

6. **Avalanche (AVAX)** – Another high-performance blockchain with a focus on interoperability, DeFi, and smart contracts.

7. **Chainlink (LINK)** – An oracle network that connects smart contracts to external data sources, allowing real-world data to influence blockchain applications.

8. **Polygon (MATIC)** – A scaling solution for Ethereum, helping to reduce transaction fees and improve the speed of dApps.

9. **Cosmos (ATOM)** – Aims to create an interconnected network of blockchains, facilitating the transfer of assets and data between different blockchain networks.

10. **Arbitrum (ARB)** – A Layer 2 scaling solution for Ethereum, designed to improve speed and reduce transaction costs on the Ethereum network.

These coins have strong technological foundations and communities behind them, giving them the potential to reach or maintain a position in the top 10.