There are several cryptocurrencies that are not yet listed but are attracting the attention of investors due to their potential for future price increases. Here are some examples:

Immutable X (IMX): Immutable X is a gas-free NFT trading platform, prominent in the blockchain gaming space. It is predicted that with the strong development of the NFT and blockchain gaming industry, IMX may see significant price increases.

Polkadot (DOT): Although Polkadot has been listed, some sub-products and projects associated with Polkadot are still not widely listed. Polkadot offers flexibility in connecting different blockchains, making it a project with great potential.

Internet Computer (ICP): ICP is a pioneering project in building a decentralized "Internet," replacing traditional cloud services. If developed successfully, it could become one of the cryptocurrencies with strong price increase potential.

The Graph (GRT): As a protocol for searching and querying data on blockchains, The Graph is gaining strong attention. If the popularity of Web3 and DeFi increases, GRT may witness significant growth.

Aptos (APT): This is a new blockchain created by the development team of Facebook's Diem. Although it has been launched, Aptos is still developing and is not widely listed on all exchanges, making it an attractive option for investors.

LayerZero (ZRO): LayerZero is a cross-chain protocol that helps blockchains communicate with each other, and it is expected to play an important role in the future of Web3, especially as connectivity and interaction between blockchains become increasingly important.

These coins are not yet widely popular but have strong potential for future development due to their technology and accompanying applications. However, before investing, you should conduct thorough research on each project.