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,
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
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.