look at the history and you may be able to answer your own question better. in the past few years there have been lots and lots of new coins and tokens released and you can see that majority of them were on top at some point and then died after a while because their "demand" is only speculative demand and that doesn't last forever as newer ones come along.

somebody posted a very interesting website which i saw today: http://deadcoins.com/ take a look at see the fate of majority of altcoins.