Ethereum may not replace Bitcoin, but it will be popular as long as the Ethereum platform is in demand due to smart contracts.
Any well-promoted crypt can replace bitcoin as a store of value or for speculation. That is purely marketing.
But the cryptocurrency
Buy, Sell and Exchange Crypto Ultra-Fast that works on a faster blockchain - not 9-10 transactions per second, but at least tens of thousands of confirmations per second or millions - such a crypt can replace fiat money.
