I am tired of hearing 'promises for good things in the future' - Give us something already. You cannot expect anyone to mine yet alone buy a coin where the devs refuse to discuss the future of the coin beyond 'we'll tell you when we are ready, BIG THINGS ARE COMING' nonsense.
Either come out with even a rough outline of some plans for the future or admit there aren't any, but its not reasonable to string people along with literally no disclosure of anything you are planning for the coin.
It doesn't have to be certain - it just has to be something. Something to show the coin isn't a waste of time and money.
No one will stop you to mine some other coin. There is other coins, houndred of them. Other possibility to become rich is gun and bank, but you can get jail. Your choice.