I do not think any coins will beat bitcoin in the future, it's from year to year bitcoin prices are rising and followed by another coin, the first crypto currency is bitcoin so I think nothing will beat the popularity of bitcoin.
That may be true, I agree with you halfway there buddy.
But we cannot take away the possibility that other coins might overtake bitcoin in the future, I mean the odds might be slim but still chances will be there.
Note that different coins have different marketing strategies, hence, different market channels. Their growth would then be largely dependent on the interplay of these channel and developers at the same time.