I think mining will never stop and will continue forever as long as there is a great price of bitcoin and any other altcoins. Mining is just like your job or career, if you quit your job or career you will get nothing and you don't have a salary or income, like in mining if you stop mining coins you will lost your job but the coins that you mine either you sell it or hold it. That's why I think mining will never stops and I know that crypto currency will be good in the future.