I think it'll only be good to do that if you really have some extra cash. In fact, mining is considered to be a job for many people and you can't say you're gonna leave all your earnings on hedging in another investment. So how are you gonna pay your bills, rent, etc. It is good to save but not to save all.
Hedging in this sense means protecting the values of the coin against fluctuations, so withdrawal into fiat is equally part of hedging. Hedging is very important aspect of this biz, at least one is sure he is not losing any amount he has earning except it is helped with some trading experience, I had got some tokens that is worth a certain amount last year and instead of hedging I used in buying etherium which dumped hugely and regretted deeply