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Crypto
Proof of Work
The system Bitcoin and some other blockchains use where computers solve hard math puzzles to confirm transactions and earn rewards.
Proof of Work keeps the blockchain secure because it's expensive and hard to fake. It also creates new coins as a reward for the winners. The downside is it uses a lot of electricity, which is why some newer blockchains switched to easier systems.It's like a giant global contest where the computers that solve the toughest puzzles first get to add the next page to the blockchain and win new coins.
Real world: Mining farms with thousands of powerful computers race to solve puzzles, using electricity like a modern gold rush to secure the network and get paid in Bitcoin.
💡 Proof of Work is what makes Bitcoin so secure, but it's energy-heavy — great for understanding why crypto can be both innovative and controversial.