Answer:
I am a portal to another world which you cannot enter. Only you can see me but I can't see you.
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?
At night I come without being fetched, and by day I am lost without being stolen. What am I?
I am a million people's wakeup call, gossip party and adrenaline rush. What am I?
Born of sorrow, grows with age, you need a lot to be a sage. What is it?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.