Although some ideas from the 2017 ICO craze faded into the background, some have taken main stage in 2021. DAOs are an innovative way to organize money and people, and NFTs went from headlines about record-breaking sales (a cheeky $69 million) to being the new backbone for hundreds if not thousands of web3 projects. Under the hood, NFTs are an ERC721 smart contract - a program that codifies all the rules behind the digital asset. The most basic of NFTs simply allow you to transfer the token to another wallet; the more interesting ones are just around the corner.