I think you're replying to the wrong comment but to try and answer your question if a region is completely isolated from the rest of the bitcoin network one of two things can happen:
- If the region doesn't have a significant hash power (the case in most places in the world really) then the block rate will effectively go to zero, meaning that bitcoin will effectively "pause" here and be unusable until fresh blocks can be retrieved from the outside and new transactions broadcasted to the external miners.
- If the region has enough hash power to mine new blocks regularly the region will fork its chain. If it has more than 50% of the global hash rate this new chain will be the "real" one and will take over as soon as it's reunited with the rest of the network (invalidating the "outside" blockchain and all its transactions since the fork). If it has less than 50% hashrate then the opposite happens, as soon as the longer outside chain is received it'll invalidate the fork.
In both these situations bitcoin is effectively unusable in the minority fork since you know for a fact that the chain will be erased as soon as the network is reunited.
- If the region doesn't have a significant hash power (the case in most places in the world really) then the block rate will effectively go to zero, meaning that bitcoin will effectively "pause" here and be unusable until fresh blocks can be retrieved from the outside and new transactions broadcasted to the external miners.
- If the region has enough hash power to mine new blocks regularly the region will fork its chain. If it has more than 50% of the global hash rate this new chain will be the "real" one and will take over as soon as it's reunited with the rest of the network (invalidating the "outside" blockchain and all its transactions since the fork). If it has less than 50% hashrate then the opposite happens, as soon as the longer outside chain is received it'll invalidate the fork.
In both these situations bitcoin is effectively unusable in the minority fork since you know for a fact that the chain will be erased as soon as the network is reunited.