Rollups like Optimism, Arbitrum and zkSync have profilerated atop Ethereum, notorious for its sometimes exorbitant fees, as a means of avoiding congestion. Bitcoin (BTC) is the original and largest blockchain and is considered the most secure, but lacks Ethereum’s programmability via smart contracts. www.coindesk.com
Rollups like Optimism, Arbitrum and zkSync have profilerated atop Ethereum, notorious for its sometimes exorbitant fees, as a means of avoiding congestion. Bitcoin (BTC) is the original and largest blockchain and is considered the most secure, but lacks Ethereum’s programmability via smart contracts.
www.coindesk.com