Again one word.
ALONE is boring. When you have no choice, it is boring.
I understand that you love Bitcoin, but why you cannot understand one simple thing:
people will buy Bitcoin to buy altcoins, and Bitcoin will profit from it.
If it is alone, if it is like monopoly which beats small competitors, it is not good.
I think you never will be able "to BUY STUFF only with Bitcoin". The word "only" is not correct.
In short: people have feelings, Bitcoin alone is boring,
Bitcoin is boring?
OK dude, I stop reading here, enough nonsense.
Hold on your altcoins and enjoy

I've told you already that it is not true and gave you an example, and there is a link in my signature.
But some altcoins are implemented into market a way better, than a coin in my signature.
And actually you can ONLY use Bitcoin to buy stuff (I may have problems with english grammar, but the sense of the sentence can be caught easily), you can only save your altcoins in wallets in hope that somebody later will implement payment with them.
Good luck with that.