Crypto and especially Decentralized finance (DeFi) promised to democratize finance, the same way the internet made content accessible to everyone.
The first commercial Bitcoin transaction back in 2010 was to buy two Papa Johnโs pizzas, with the moment heralded as the first step towards widespread everyday crypto payments.
More than a decade on that's still nowhere in sight. Bitcoin and Ethereum support 7 and 15 transactions per second (TPS) respectively compared to the 5000 and 24000 TPS of Mastercard and Visa.
Supply and demand dictates that transaction costs surge with heavy use. With particular load heaped on Ethereum due to the explosion in popularity of DeFi, NFTs and crypto gaming which all run on the protocol, average transaction (gas) fees have increased from $2 a year ago, to $50 in November 2021.
If Ethereum wants to power the vision for the web 3.0 and metaverse (check out our overview of NFTs and crypto gaming) it needs to enormously scale its capacity.
The quick way to achieve scalability would be to sacrifice decentralization or security (AKA the blockchain trilemma). The Ethereum community has instead chosen to execute a wide scalability roadmap towards Ethereum 2.0. Rollups in particular are poised to be the key scalability for Ethereum in the foreseeable future and have already reached almost $6B in Total Locked Value (TLV), up 8x in the last months.
But what is a rollup, what are modular blockchains, and why should we care about the blockchain trilemma?