Although you are not teachers in school, you have taught me DeFi, blockchain, cryptography, metaverse, decentralization, NFT, distributed ledger, consensus mechanism, double spending, fork, smart contract, hash value, token, lightning network, proof of work, private key, human nature, and other ways to suffer losses and make money. You are my life mentors. I wish you all a happy Teacher's Day! Salute to every teacher on our life path