I think that always better to sell your mining coins if you are not in China, taxes is very hard to pay right now and better to have enough money for it.
I don't think that people will be buying mining rigs, mine Bitcoin and lose money to pay for their bills since the profit of mining do not come that easily, it takes a lot of time before you get back what you pay for the mining rig and gain profit. I guess the only advantage of mining is that you are earning digital currencies stable than trading them.