Ethereum cannot maneuver bitcoin easily. Bitcoin holds 50% of the market cap and ethereum did not though it was the second largest cryptocurrency. The popularity also of bitcoin than ethereum helps to boost its price.
A lot of speculations I've observed telling that ethereum will dethrone bitcoin but up to now, ethereum is just in the second place.
It will not be east for eth to do that and it will be a long way to go if it really can take the place. But I don't really think it can make it.