Im a newbie and have a question:
1) If the difficulty increases exponentially.
2) If in the coming months "halving" will reduce to half the miner's reward.
3) If the projections of various spreadsheets indicate that it is not currently profitable mining.
How will continue to operate the system?
Don't worry I still don't understand everything as good as I wish I would ^^
1/No difficulty increases only if the amount of hashing power does. The more the hashing power the higher the difficulty.
2/Yes for this one
3/It's not profitable to mine alone, but big industries like Genesis find it very profitable
Answer is in question 1
If it's not profitable, some miners will stop, hence less hashing power, hence less difficulty, hence more profitable for remaining miners ^^