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.
could be, but not in the near future. a lot of demand and a limited amount of bitcoin in the market makes the value of bitcoin rise very drastically. actually etherum can, the market demand of etherum in the market is also large, but the amount is not limited. that's what keeps the etherum up not yet like a bitcoin at the moment. maybe the next 2-3 years.