I can see why you included BTS. It's been at rock bottom at quite some time now and with Larimer's EOS recently exploding i don't see a reason for BTS prices to not have the same kind of growth, even though it is indeed a pretty old protocol.

Also Steem, seems like it's just caught fire recently and caused quite a stir. But personally i can see it go much higher still.

Basically any currency that is in its infancy and nobody is noticing it yet(ADA pre-pump, EOS prepump), or cryptos coming off huge pumps and is bottoming(including sia).