A "C token" could refer to a few different concepts in the cryptocurrency world, so context is important.
One prominent definition relates to Compound Finance, a decentralized finance (DeFi) protocol. In this context, cTokens (like cETH, cUSDC, etc.) are tokens that represent a user's deposited assets and their accrued interest. When a user deposits an asset into a Compound lending pool, they receive a corresponding amount of cTokens. These cTokens can then be redeemed at any time for the original asset plus the interest earned, as their exchange rate to the underlying asset increases over time.
"C Token" might also refer to a specific, lesser-known project. For example, there's a project called Chainbase whose token is designated as "C," which is a platform for building on-chain data infrastructure. Additionally, a project named "Carbon Coin" uses the ticker "C-TOKEN." Due to the lack of a dominant, single "$C token," it's crucial to specify the project you're interested in.
