Works perfectly fine in llama.cpp throwing 70+t/s at me with 128k q8 K/V context when using the IQ4_NL quant + MTP at q4 MTP K/V.
Also leaving this here because you might find it useful: https://hypfer.github.io/will-it-fit-llama-cpp/
Crypto (to my knowledge at least) moved away from GPU mining. I guess you could maybe rent out GPU compute, but - being in germany - it's not worth the legal hassle. You could of course always commit tax fraud, though I wouldn't recommend that.
Massive legal liability. Not worth it.