You're doing it again.

There's a perfectly parallel example to what you just described - buying X amount of coins, but only trading a small ratio of them.

Psychologically it may seem to be a benefit to you personally in the area of mitigating risk. But if you never break even on the original capital (plus electricity), it's a bad investment in hindsight. And I do understand where you're coming from; I have a 2 m/hash Scrypt rig that's been online since early December. And I live in a state that has some of the lowest electricity rates in the USA. The electricity costs are not negligible.

*Edit -Obviously the most redeeming quality of Scrypt mining on a PC is that the components have quality resale value. It definitely has that going for it.