You always have to consider how many DRKs you'd get if you mined something else, sold it and bought DRK.

If you can get twice the number of DRKs that way => why not... except the logistics of moving around the mining power all the time instead of leaving it @ DRK.

The price of a coin should naturally gravitate towards its mining cost. If it costs >0.03 to mine and the price is 0.0165, that's good for price potential. It's also good in terms of using mining power elsewhere and buying DRKs off the market - creating demand. The opposite is the case when others are mining you for being the most profitable and then dumping the coins / suppressing the price.