for long term purpose, which is better to invest in , Bitcoin or Ethereum ? Lets discuss that ..
Very hard to say in advance. Afterwards we will know... Therfore i think its a good idea to have both - weighted with their market capitalisation. Bitcoin has the most recognition. Ethereum is technologically more advanced. I personally think ethereum will have more performance in the long term, as ethereum is developing faster, whereas bitcoin is very similar to what it was years ago(and still not ideal solution for scaling). Just my personal opinion. No investment/financial advice!
I agree with you on that, we really can't tell yet because it is too early to know which of these coins because both of them have capabilities to be really big in the future. Though more are in favour of Bitcoin because it was the original cryptocoin and has been been here long enough, Ethereum is also second to being the most popular because it is more widely used in ICO's too. So if I were to choose which to invest in, I'd choose both.
If you compare these cryptocurrencies to know which coin will be better for long term holding, I suggest you should choose Bitcoin.
Because Bitcoin can grow more with the current popularity of Bitcoin, at least about 2-3 years to be end this trend, in my opinion, it just begins.