Ever watch that show Doomsday Preppers?
Basically, a bunch of seemingly ordinary people stock up on canned carrots and moist towelettes in the event that a catastrophe occurs. Although those people might seem insane, all it would take is one nuclear meltdown to make them the smartest people in town.
How does this pertain to fantasy baseball?
If you have the room and inclination, you could similarly benefit from prepping for your own fantasy worst-case scenario—although an injury to your corner infielder won't be nearly as devastating as the apocalypse (unless your corner infielder is Miguel Cabrera).
Right now, a handful of big league veterans still don't have a home for the season. But when they eventually do, you don't want to be one of those people frantically rushing to the wire to use a precious claim on them—not when you can grab them now for next to nothing, throw 'em on your bench and wait for disaster to strike—you know, metaphorically.