I am not using any other crypto currency at the moment, but I don't think any of them will ever overtake bitcoin. Its the standard of all, its like money now, do you see money competing with anything else? I really don't see that. So I feel bitcoin will hold it own in the market and would probably keep growing.
Like you , i am not also using different crypto currency . Why? Because as of now we all know that bitcoin is upgrading and its value increases on its highest peak, so what is the reason for us to used other crypto currencies? And there no such thing as bitcoin 2.0 the best way is to just develop more the bitcoin of today for the future. We dont need a new crypto currency or other thing ,the bitcoin is okay as of now we just need to develop and support it more for its value to increase more and for the buisness to be open on accepting bitcoins. If its happen bitcoin would be the next currency of the future.