Decentralized Finance on Ethereum. Blockchain always gets snarky comments on HN, but it is a rapidly evolving space. Whereas the 2017 bubble was built on token ICOs and hype, what I'm seeing now is advanced financial products including decentralized money markets for car loans (https://defimoneymarket.com/) and fractional investments in tokenized real estate (https://realt.co/). Stablecoins (tokens that trend towards the value of $1 USD) have also taken off in a big way, with Dai being one of the biggest decentralized examples (https://makerdao.com/en/). Lending platforms such as Aave (https://aave.com/) have created markets for various tokens, including stable coins, paying out variable interest on deposits.

User-friendly apps have cropped up that enable people to easily save and invest their stable coins and earn interest, such as Argent (https://www.argent.xyz/). People are creating Social investment strategies around tokens and pooling their funds together on TokenSets (https://www.tokensets.com/), these are basically social ETFs.

There are no-loss lotteries that simply invest the pool of funds to earn interest and then one lucky staker wins the interest (https://www.pooltogether.com/). Decentralized funding of open-source Web3 projects (https://gitcoin.co/).

I can really go on and on, I'm not even covering some of the developments with Non-Fungible Tokens, gaming, governance, etc.

Here are a couple newsletters I recommend for following the space: https://thedefiant.substack.com/ https://bankless.substack.com/