Crypto technology has come a long way.
Innovation wise, alt coin has better and more clever idea than the current form of bitcoin.
most altcoins are stuff like mySQL database currencies, like ripple. and the current 'ether' waiting list. even some of the bitcoin 2.0 crap are SQL not blockchain based.
then there are alot of clone coins which a tweak in the total coin cap, or the block timing. which would fall over if they went largescale for multiple reasons i wont waffle on about.
then there's PoS which is not about giving people a reward for putting alot of hard calculations into securing bitcoin, but purely to reward the largest hoarders
but name me one actual coin that you think has some true benefits that even a rational minded person that can think logically and out of the box, who cant find a fault in its concept or usage.