Right, but do any cryptos have proper use cases? The few biggest ones are pretty effective for making the process of moving money across borders easier (albeit, only an advantage where that might be controlled or otherwise difficult).

Payments processing is a big opportunity, but it's a bit of a chicken and the egg problem where you need magnitude to spark interest / use and you need interest / use to grow and gain magnitude. BTC has the uptake but can't handle the volume, and while others (most notably ETH) seem to have addressed most technical hurdles and can handle the volume, but there are so many and they're so fragmented that no magnitude has built up.