You will never EVER be able to mine all blocks. Let's assume a block of cobblestone takes 0,5 seconds to mine and that the world is made of cobblestone.
60000000*60000000*64 = 2,304*10^17 blocks of cobblestone.
2,304*10^17/2/60/60/24/365 = 3652968036,53 years
In short, it would take you over 3,5 billion years to mine out every single block in Minecraft. Good luck.