Mining isn't dead. The difficulty level drops as less efficient miners leave the market. The supply curve doesn't shift with bitcoin. Supply will be the same no matter if it's one miner or a trillion. What will make mining tougher is the regulations restricting power usage. Companies who are already mining will maintain profitability under grandfathered licenses while new companies will not be allowed in. I talk a bit more about it here: https://steemit.com/cryptocurrency/@stoadvisors/incredible-returns-with-mining-tokens-my-fundamental-analysis-of-wtt