I think bitcoin has been one of the biggest innovations of the human in the past years. Many altcoins have been created after bitcoin. But none of  them have been successful as bitcoin is. Why is that?
Why no altcoin can replace bticoin?
Every new thing and every technology is usually replaced by a newer one as the world is always developing.

The first television built was mechanical, then electronic television were invented, then colour televisions, digital, 3D, ....
The first automobiles invented were steam-powered wheeled vehicles, then electric automobiles appeared. Now we have autonomous cars. Now we have Tesla model S. Now we have Lamborghini.
All of us know about the developments made in mobile phones.

Every thing is being developed. Every device is finally replaced by a newer one. Why no altcoin has replaced bitcoin till now? Do you think it will happen in future?
I personally think people will trust what Satoshi has created more than altcoins till many years later.
Altcoins are created to make the developers rich. But bitcoin is different. Bitcoin was created in favor of us. So, no altcoin can be trusted as bitcoin.

What do you think?