ETH already has half of the worth of BTC on the market. And it have been only a year. I think it can overtake BTC in a couple of months.
It won't happen. ETH is still quite far to reach or take over bitcoin. It has a lot of supply compare to bitcoin and even it will reach bitcoin's market cap the price of ETH is still not going to be the same with bitcoin. There's a conflict between the price, supply and demand of a coin and that's what we need to consider about bitcoin. ETH is a good choice for adding it to portfolio and we all know about it.