Will BTC be replaced from ETH in future? Because as of current crypto market, demand for the ETH is higher than BTC due to various kind of ICO projects.
It will and it must. Imagine you are sending your transaction that cost you around $25 for a single transaction if you are using bitcoin blockchain and then if you are moving toward ethereum and it will cost you around $2.But for the actual payment ethereum should become the first and then bitcoin will be the second.
People are more familiar to ethereum platform.