Mainnets are important in part because they provide a clear value of a cryptocurrency in a real-world implementation.
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Mainnet is the term used to describe when a blockchain protocol is fully developed and deployed, meaning that cryptocurrency transactions are being broadcasted, verified, and recorded on a distributed ledger technology (blockchain).
source Binance Academy
Mainnet in cryptocurrency provides an easy way of gauging a blockchain project’s success when prices are difficult to predict. It is an important technology feature that anyone looking to invest in an Initial Coin Offering should have a clear idea about, before putting any money to use. Before investing in an Initial Coin Offering, it is vital for an investor to ensure a blockchain project has a mainnet. The sign of a mainnet or a testnet shows how serious a project is as the two features affect the price of a cryptocurrency in one way or another.
In contrast to mainnet networks, the term testnet describes when a blockchain protocol or network is not yet up and running at its full capacity. A testnet is used by programmers and developers to test and troubleshoot all the aspects and features of a blockchain network before they are sure the system is secure and ready for the mainnet launch.
Programmers use testnet to troubleshoot and trial any new features on a blockchain.
The most promising Mainnet to watch out for.
Ethereum Mainnet
Ethereum Mainnet is the largest Ethereum Virtual Machine (EVM) network to date. The Proof-of-Work network was established in July 2015. Ethereum Mainnet is an open-source, blockchain-based distributed computing platform and operating system featuring smart contract functionality. There is only one public Ethereum Mainnet. Applications that are built on the Mainnet are able to interoperate, similarly to how applications built on the Internet can connect to each other, leveraging the full potential of decentralized blockchain.
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Conclusion
Mainnet features act as proof that a blockchain project is being implemented and that the developer’s team is working on making it efficient and better. Mainnet also does affect the prices of cryptocurrencies.