Because folding space-time is not enough. Now, you want to fold through time.
Step 1: Find a decent time-space folding machine.
Step 2: Fold the fabric of reality.
Step 3: Profit!
Folding paradoxes: Learn more
Folding-induced brain damage: Consult a doctor
For experts only:
Time-Space Folding Algebra is not for the faint of heart.