How else are you going to guarantee the irreversibility and proof in such a system? The block chain was very much a careful design consideration.
Every user doesn't even need the full set of transactions. I buy and sell bitcoins and have only run the desktop client for a few minutes to see what it looked like.
Every user doesn't even need the full set of transactions. I buy and sell bitcoins and have only run the desktop client for a few minutes to see what it looked like.