Cmon guys, stop "killing" bitcoin, every month i am hear from people about new bitcoin clone that will kill his father in short term, but everything they are wrong.
That is right. No other altcoin can replace the bitcoin if the bitcoin is developed properly in the future.
there are altcoins that could replace bitcoin easily, in my opinion ethereum for example is really strong right now with both of his coins
Nope. Not a chance. Given that ethereum has an unlimited supply, the linear inflation scheme that ethereum has means that it would be negligible over some time.
I agree in future some altcoin will come up with some powerful features but still bitcoin will be able to adopt that new feature over a matter of another enhanced version or with a third party plug-in. As long as bitcoin is flexible with new inventions, nothing to worry.