Ah!
I'm not the only one wondering where the $ comes from. Another mystery are mineable coins such as Bitcoins. What happens when they are all "mined"? Why wound anyone have a node "mining" (hosting computations and verifying transactions) if there is nothing to gain? Once all Bitcoins are mined, the protocol has to be changed allowing for more Bitcoin. Just like governments printing more money.
You are right. Either that or instead of mining what will happen is trading. Bitcoin will be bought and sold to the highest bidder and since the supply is limited it becomes even more valuable.
Thanks for visiting. Saw some of your posts. Nice pics. Following you.