My favourites and very promising coins are actually two:

1. Speedcash SCS - having super low supply below 500k (price now below $0,4) and active development I see this coin growing 10-100x. Really, they already have live messaging over blockchain and BURST techno which is better than lightning network

2. ECC coin, which now is incredibly cheap 10-11 sats, but has huge potential with file storage, messaging, ANS and multichain plans