There are several cryptocurrencies that are considered strong and have practical uses and are expected to witness strong growth in the near future. Among them are:

1. Ethereum (ETH): Ethereum is considered one of the most prominent cryptocurrencies due to its ability to support smart contracts and decentralized finance (DeFi) applications. With the Ethereum 2.0 updates, the currency is expected to witness significant growth in uses and popularity.

2. Chainlink (LINK): Chainlink provides a solution for connecting external data to smart contracts, which enhances its use in various applications. It is expected to continue to grow with the increasing adoption of DeFi.

3. Polkadot (DOT): Polkadot seeks to connect different blockchains, which enhances interoperability between networks. Demand for DOT is expected to increase as the need for linking technologies increases.

4. Cardano (ADA): Cardano is considered one of the promising projects in the field of smart contracts, focusing on security and reliability. With further developments, it may witness strong growth.

5. Solana (SOL): Solana is known for its high speed and efficiency in processing transactions, making it attractive to developers of decentralized applications. It is expected to continue to attract more users.

When deciding to invest in cryptocurrencies, it is important to do thorough research and understand the potential risks.