Bitcoin is still the king of cryptocurrency and the rest are just alternative coins. All the profits of this altcoins are just the faucet for the bitcoin to go strong. I do not really know what is the scheme for bitcoin and other altcoins but i bet that these altcoins are basing bitcoin market price movement. And that is why bitcoin could never be dethrone by other crypto but altcoins could achieve what bitcoin has achieve and i am seeing ethereum has a lot of potentials but it cannot dethrone bitcoin for now.
Altcoins is never powerful than bitcoin and i think they are not created to dethroned bitcoin but just proves that bitcoins concepts has evolve the world of technology and people started to used different kind of platforms and its usage with the use in a form of cryptocurrencies.