Answer:
Digital white-out.
Some will use me, others not. Some have remembered, others forgot. For profit or gain, I'm used expertly. I can't be picked off the ground or tossed into the sea. What am I?
I am what one cannot keep, two cannot hold, and three cannot destroy. What am I?
I am a shiny metal sheet that covers BBQ food.
I run up and down the stairs without moving. What am I?
The answer I give is yes, but what I mean is no. What was the question?