KoinlyticsThese three chains hold most of the crypto conversation. They share a common ancestor and diverge sharply on what they optimize for. Understand those choices and you understand why one chain feels like a bank vault and another feels like a race car.
Bitcoin: the vault
Bitcoin was designed for one thing: to be digital money that nobody controls. Its scripting language is intentionally limited. It cannot run a Uniswap. That is the point. Every simplification makes the network easier to secure and harder to break.
- Block time: ~10 minutes
- Consensus: Proof of Work (miners burn electricity)
- Programmability: minimal
- Supply: capped at 21 million
The trade-off is throughput. Bitcoin processes about seven transactions per second worldwide. Fees spike when the network is busy. But nothing runs longer or with fewer outages than Bitcoin does.
Ethereum: the programmable one
Ethereum kept the ledger and added a programmable layer on top. Anyone can deploy a smart contract. That single design decision produced DeFi, NFTs, stablecoins, and everything else you have heard of.
- Block time: 12 seconds
- Consensus: Proof of Stake (validators lock ETH)
- Programmability: full Turing-complete VM
- Supply: no cap, deflationary via fee burn
The cost is complexity. More code = more bugs. Fees rise when demand hits capacity, sometimes to $50 for a simple swap. Layer 2s (Arbitrum, Base, Optimism) solve this by moving transactions off mainnet and settling in batches.
Solana: the race car
Solana rebuilt from scratch to squeeze the most throughput out of one chain. No layer 2s. Sub-second blocks. Cents per transaction even under load. The trade-off shows up as complexity in the validator hardware and occasional network stalls when unusual traffic patterns overwhelm the scheduler.
- Block time: 400ms
- Consensus: Proof of Stake + Proof of History
- Programmability: Rust-based smart contracts
- Supply: inflationary, roughly 5% annually, tapering
What runs where
The one thing to remember
Bitcoin optimizes for security and simplicity. Ethereum optimizes for programmability at the cost of throughput. Solana optimizes for throughput at the cost of complexity. Every other chain is somewhere on that triangle.