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.
Is tax that much high? This is crazy, if yes. Why should we pay one second of the money to the government? This is not fair, also. For the topic, if you really can find something like ADA, IOTA, VERGE, getting million dollars is easy.