hi, can anyone tell me how long it will take to mine all the coins and what will happen to the network.
Total of 21 million bitcoin will be mined by 2140 so we might not be alive by that time. Bitcoin's price will be very high so that miners can be in profit even with just transaction fees and 0 block reward.
Bitcoin network is designed to run forever...
As you said the last bitcoin will be mined in the year 2140,still long way to go and at the time the price of bitcoin will be unimaginably high and the miners still have to be operated if all the bitcoins were mined to confirm the bitcoin transactions and the miner will get good rewards for the confirmation because even the fraction of a bitcoin worth a lot at that time.