it's definitely attracted more attention in last couple of years, more money to 'invest', more transactions, they will appear to be used more, but do they have any more 'use'?
some of them do have real life applications or on based on real life activities; some have online value like being the default currency of a gambling site or such; some have technological value or their tech has experimental value; value of some are purely speculative; but most of are simply pump & dump shitcoins, per se, and have no 'use' whatsoever!
op imo
coinmarketcap.com is the go to for altcoin stats at the moment!
mapofcoins.com is also an interesting website to browse through; gives an overview of the history of alts, in general, in the form of diagrams!