Riddle Me This?

Riddle: I'm so fast you can't see me, though everyone else can see straight through me. I won't stop until the day you die. What am I?

Answer: The blink of an eye.

Source: https://www.riddles.com/2850

I'm so fast you can't see me, though everyone else can see straight through me. I won't stop until the day you die. What am I? — Riddle me this? by Zak Woodward v1.

Riddle: I'm so fast you can't see me, though everyone else can see straight through me. I won't stop until the day you die. What am I? Answer: The blink of an eye. — by Zak Woodward v2.