LOL. I presume that you haven't read a lot enough yet to be giving that kind of thought. Clearly, as good as ethereum is, or even when it develops more than what it is already today, it is pretty clear that it will never really take the place of bitcoins on the top. I most certain that ethereum will remain second and continue to look up into the king of all crypto currencies which is bitcoin. In fact, I even think that ethereum might even get replaced by a other crypto out there that has really good concepts and potential. Just saying.