What cryptocurrency beyond Bitcoin is actually worth understanding in 2026

[CMPunk02]

I have a basic understanding of Bitcoin. I keep hearing about Ethereum, Solana, XRP and various others and I am not sure which ones have genuine use cases versus which are speculation dressed up as technology. I am not looking to invest in anything right now - I genuinely want to understand which cryptocurrencies have real-world applications that distinguish them from Bitcoin. What is worth understanding and why?

[VidiTechnica]

Layer 2 networks built on Ethereum - Arbitrum, Base, Optimism - are where most actual crypto usage is happening in 2026 because they inherit Ethereum's security while solving the cost and speed problems. Knowing these exist and why explains why Ethereum itself processes relatively few transactions directly despite being extremely widely used

[Cheeky Blake]

Ethereum is the one to understand after Bitcoin. It introduced the concept of smart contracts - self-executing code that runs on a decentralised network without any central party controlling it. Every DeFi application, most NFTs, most stablecoins and a large proportion of real-world tokenisation projects run on Ethereum or chains that are compatible with it