I don't think that bitcoin can or should be the best crypto on all levels though. Let bitcoin do the one thing that it's best at.
Other coins will compete for the rest.
Yes, there's no point and need for replacing bitcoin with another one. Most of the people are going to stay with bitcoin and will treat other alts as for trading and gambling purposes only. While bitcoin is going to be the main crypto currency which can be good for different transactions that they wish to use.
and we have seen how strong this currency is right now. After it was almost lost it's value it has survive and break the all time high.
That is something people.
Those people that are holding bitcoin and pulls out are starting now to migrate to ETH and loves the way of smart contracts. I just don't know what's in their mind but it doesn't mean that it will replace bitcoin but maybe they are trying something new and thinks that it will be more profitable for them if they are going to migrate there.
Yes I know it that it cannot replace bitcoin but because of it, many seems to be thinking that it can be a threat for it. But whatever it takes, that is good for trading and just because that it is on the second list of the coin market cap and it's far from the total market cap of bitcoin. It won't replace it though I was talking about those people that thinks it will.