I have a sincere question, sorry if it has been asked before.  But with this switching port (which I think is a great idea) it mines only what is worth the most at that point in time correct?  What's the point if the coins are all up and down in value?  Why not just mine what will be predicted to be worth the most over the time it would take to get a block mined so those of that are into quick sales can do that?  Sorry again if this has all be covered!