I think many mid-to-tiny market cap coins without real use cases or development teams will likely have failed. A lot of meme coins and heavily hyped tokens tend to fizzle out when the buzz dies, especially ones with no roadmap or community backing. Personally, after a small Coinme transaction error last year, I had to contact Coinme customer service, and they reminded me that even platform reliability matters. If a crypto project lacks transparency, active devs, or clear utility, it's probably headed for obsolescence

Can you elaborate on what you would consider failed? Is failing to live up to the hype of being a ETH-killer considered failure when market cap goes below 20 billion or so, or would it need to go into the millions?

I keep my Tether notes here:

https://manifold.markets/BoltonBailey/will-tether-depeg-even-slightly-in-1bf8081ebeb2#TgYk1oyzF5ajECpwnSLy