I think calling it useless is going a bit far, since obviously the lightning network should bring a fix to some of these problems for the retailers. Of course, this'll remain unchanged on the exchanges, Andreas Antonopoulos himself has confirmed this, so the problem remains of fees or transaction times remain in some places.

We've seen bitcoin's market dominance go from the likes of 60% to 30-35% currently, wihle this is because of the other very competitive cryptocurrency projects that are out there and being pushed to crowds of cryptoenthusiasts through bounties and all sort of marketing means, adding on top of that bitcoin cash which is also being heavily promoted, another reason for bitcoin's demise is the lack of communication coming from the development team