What is an example of a core income?

Could you please elaborate on what you mean by "core income"? In the context of finance and particularly in relation to cryptocurrencies, the term "core income" isn't a universally recognized phrase. However, if we assume it refers to a fundamental or primary source of revenue, an example in the cryptocurrency space could be transaction fees earned by miners or validators who secure the blockchain network. For instance, in a proof-of-work blockchain like Bitcoin, miners are rewarded with newly minted coins and transaction fees for successfully adding blocks to the chain. The transaction fees, which are paid by users to incentivize miners to include their transactions in the next block, can be considered a form of CORE income for miners. Similarly, in proof-of-stake blockchains, validators who stake their tokens to secure the network and verify transactions may receive a portion of the transaction fees as a reward. This reward can also be considered a core income for validators. It's important to note that the specific sources of core income can vary depending on the blockchain protocol and its economic model.