Answer:
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 dig out tiny caves and store gold and silver in them. I also build bridges of silver and make crowns of gold. Sooner or later everybody needs my help yet many people are afraid to let me help them.
Teenage girls are pros at creating me. Learn me in classes.
If lightning strikes an orchestra, who is most likely to get hit?
I flow from the Homerβs mouth when he sees doughnuts.
When is it bad luck to see a black cat?