> Every participant in the system must keep a copy of the block chain, which now exceeds 11 gigabytes in size and continues to grow steadily. This alone deters

> Every participant in the system must keep a copy of the block chain, which now exceeds 11 gigabytes in size and continues to grow steadily. This alone deters casual use. Is 11GB really that much? Downloadable video games and movies easily top this size, and it's not at all uncommon for a person to "have" several pieces of similar media.