i think not it is a little bit overestimated to say that Ethereum will overtake Bitcoin because ethereum is still not to be not limited to a certain supply.
I agree, we all know bitcoin has come a long way to reach the top of the market and ethereum is far too early to claim the throne, though I believe it is possible I don't think it will happen in just a couple of years. In order for ethereum to overtake bitcoin it must first gain all the credibility and achievements bitcoin has done and it must also be more than acceptable compared to bitcoin.