why bitcoin mining difficulty is increased?
I just want to knows that why the bitcoin mining difficulty level is increased and i am afraid of the life of future miners. Maybe in future the miners electricity will cost more than our rewards because of the difficulty level.
Perhaps try reading up on what BTC mining is all about...
There is a
Beginners & Help section in the Forum just for folks starting out. I highly suggest you browse through it and post utterly basic queries like this one there...
BTC has value because of the work required to process the transactions.
The BTC network strives to keep an average time of 10 minutes per-block found, it does this by adjusting difficulty every 2 weeks or so.
If if more/faster miners go online and blocks are found too fast, diff goes up to increase the effort which increases time needed per-block to bring it back to the target of 10-min average. If less miners are online and block are too slow then diff goes down to hold the 10-min average.
Yes as time goes by older, less efficient miners become less profitable and eventually will eat more than they earn so as tech advances you need to upgrade. So what? That's how Life goes in pretty much any business.