iPhone vs Samsung, Android vs iOS, BMW vs Mercedes ....

Those are products we're talking about a currency.
There is no real dollar versus euro competition except for people betting on them. Both sides want their currency to be lower to boos exports and limit imports.
And besides that there is no rule that we must have competition in every field.
Google vs...bing ? lol
Facebook vs...I don't even know an alternative
Amazon vs..
Bitcoin vs Ethereum. Yes its true. Ethereum has all possibilities to compete with Bitcoin and if you can see it has almost 20+% of the marketcap share while bitcoin reduced to 50% from 80% over the past 2 years.
Market cap does not mean anything...
There is one store accepting eth for every thousand that is accepting bitcoins.
Most of the people that have heard of crypto believe bitcoin is the only cryptocoin out there.
Inflated market cap with a premined 60 million out of 90 is not relevant.
I guess no one can compete bitcoin right now because of the huge number of people join with it. There are several investors put up their money to grow and be circulated so there's no competitors that are involve but there are many speculators or scammers who are talking and spreading trash information about bitcoin. It is still be no clue if who are they to bring the name of bitcoin down. Competition is not needed with bitcoin but just helping it to grow is what we aim for and for the future of our economy.