Every person in the world now owns a matter replicator, but due to the limitations of the technology, there is a 24-hour cool-down in between each use. How would people use this technology?
Its a space of 1meter×1meterx1meter, basically a cubic meter where the matter replicator works on. (So, no replicating cars, since its too big)
Have the replicator print a replicator that auto-prints identical copies of itself as often as it can so you can cause the collapse of reality without having to be involved.
Hell, have the replicator print a replicator without the 24-hour cooldown to hurry things along a little