When bitcoin is actually "mainstream" and the volumes of transactions that we are seeing today, is becoming a normal thing, how will the network handle it?
the amount of transactions which we had these days is literally fraction compare to bright future, where bitcoin will become "mainstream"..and yes, current network with this size of block can't handle it and you can see it right now..
https://blockchain.info/unconfirmed-transactionshttps://blockchain.info/charts/n-transactions