Does PoA Completely Solve the “Nothing at Stake” Problem, or Just Mitigate It?

Decred (DCR) is a prominent example of a cryptocurrency that uses a hybrid PoW/PoS consensus mechanism, which is a form of Proof-of-Activity. Decred's model mandates that both miners and stakers must approve all transactions and rule changes, giving both groups a check on the other's power.

This dual-approval system is central to its security and governance.

How Does the “Nothing-at-Stake” Problem, Common in Pure PoS, Relate to PoA Security?
Does the PoA Model Fully Eliminate the ‘Nothing-at-Stake’ Problem?
What Financial Incentive Motivates Stakers to Participate in the Block Signing Process of PoA?
Which Cryptocurrencies Have Implemented the Proof-of-Activity Consensus Model?
How Does the Market Performance of Decred Compare to That of Other Cryptocurrencies with Different Consensus Models?
What Is the ‘Nothing-at-Stake’ Problem That PoA Aims to Address?
Which Popular Cryptocurrency Projects Have Utilized or Proposed a Proof-of-Activity Model?
How Does Decred’s Governance Model Specifically Utilize the PoS Component?

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