Game Theory in Crypto
How protocols use incentives to coordinate behavior among strangers — Nash equilibria in PoW, slashing in PoS, Schelling points, and famous case studies.
2 min · expert · part of Tokenomics: The Science of Token Design
What you'll learn
- Protocols as Games
- Incentive Design Patterns
Key terms
- Game theory
- The study of mathematical models of strategic interaction between rational decision-makers. Foundational to all crypto consensus design.
- Mechanism design
- Designing rules and incentives to achieve desired outcomes from self-interested participants. Crypto protocols are mechanism design at scale.
- Nash equilibrium
- A state where no participant can improve their outcome by changing strategy alone. Honest mining is the Nash equilibrium when no attacker controls 50%+ hashrate.
- Schelling point
- A focal point that parties tend to converge on without communication. Vitalik's 2014 SchellingCoin paper proposed using truth as a Schelling point for oracles.
- Slashing
- Penalty in PoS where misbehaving validators have stake destroyed. Ethereum: ~0.0078 ETH initial penalty post-Pectra, with up to 3x correlation penalty if many validators slash together.
- Vote escrow
- Locking tokens for time in exchange for governance power and rewards. Curve's veCRV pioneered the model.
- Quadratic voting/funding
- Voting/funding mechanism where impact scales with square root of contribution. Reduces plutocracy. Used by Gitcoin Grants ($10.4M in 2024 across 105 rounds).
- Sybil resistance
- Defenses against an attacker creating many fake identities. PoW (cost of hashrate), PoS (capital staked), proof-of-personhood (Worldcoin), social attestations (Gitcoin Passport).
- Mercenary capital
- Capital that provides liquidity only for short-term yield rewards then leaves. A common DeFi failure mode for protocols whose yield is purely emission-based.
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Open lessonEducational only — not financial advice.