As an aside, I have a buddy that did this with Verge coin, he was mining as a lark since this last summer. (helped he was a big miner).
He cashed out 1/2 for a cool million to BTC....the other half will get moved eventually for taxes ...)
I, of course, forgot about any such conversation on Verge...alas....another missed boat. (It's a frigging fleet I have of missed boats!)
Rare it is, but possible, usually with an alt pump.