Coin age plays a central role in proof-of-stake blockchains, where older ‘staked’ coins can have more influence in forging blocks. In Bitcoin, a proof-of-work system, coin age isn’t directly tied to consensus. However, analysts do track how long BTC sits idle as part of metrics like ‘Bitcoin Days Destroyed.’

Studying coin age (even in Bitcoin) can highlight the behavior of long-term holders. But it has no bearing on block production or mining power in Bitcoin—just a useful insight into holder sentiment or potential spending patterns. Some altcoins tried to use coin age as a security measure, though none has rivaled Bitcoin’s hashrate-based approach for longevity or adoption.