This would only be true if bitcoin were infinitely divisible. In actuality the block reward will eventually be one 'satoshi' (one hundred-millionth of a bitcoin); then, when it's next due to be halved, dividing by 2…
Under your design, it sounds like it would very much be possible to produce a modified history that remains valid, by repeating the hash chaining process from the point of the edit. You couldn't do it un-noticed because…
This would only be true if bitcoin were infinitely divisible. In actuality the block reward will eventually be one 'satoshi' (one hundred-millionth of a bitcoin); then, when it's next due to be halved, dividing by 2…
Under your design, it sounds like it would very much be possible to produce a modified history that remains valid, by repeating the hash chaining process from the point of the edit. You couldn't do it un-noticed because…