I built Sharden as an autonomous mineable PoW cryptocurrency on Ethereum blockchain which also has an interesting potential use case for miners themselves as a payment method.

Miners can mine SHARDEN themselves, trade it on crypto markets where it can acquire a market price, and then use SHARDEN as an additional payment method when mining other cryptocurrencies.

For example, a miner could receive the cryptocurrency they are mining plus SHARDEN as additional compensation for their mining work.

This gives miners a coin they can independently mine and then use as a payment method for their mining work elsewhere.

SHARDEN has no premine, treasury, or centralized reward issuer. New coins are created through successful mining and paid directly to the miner.

https://github.com/babakkarimib/shardhash

When they already mine for ETH, why would any of them be interested in a secondary coin without value?

Value should come from somewhere more than just speculation.