Collecting a bevy of beautiful safe queens is certainly a valid and reasonable way to go - makes more sense to me (as a knife nut) than bottlecaps or stamps!
But, I've built up my collection for using. Obviously, some get used more than others and if I know I'm going to be doing more than slicing or light cutting I'm more likely to pull out a Becker than a custom. But even my customs and more expensive knives are the sort that encourage use, and I do not hesitate to take them out and give 'em a little workout. I will feel bad if I damage them, but light scratches are wear marks add to their character. And I don't ever plan to sell them, so putting them away is more of a waste, to me, than putting them to use.