"no use case" and "no new tech" are just vague opinions that are typical anti-crypto talking points. Whether you personally like the use cases or not, obviously they are there as it's been on fire for more than a decade now, and continuing to grow in popularity. And regarding tech, there is no doubt that the advent nakamoto consensus algorithm is an absolutely breakthrough technology that will be seen as a pivotal moment in the history of tech, for better or wrose.