I do find myself confused by Assange's motivation when taken in context of his circumstances. If he has and holds evidence of something so damaging that a tweet of the supposed hash of the file is enough to be a threat to a person in power, then why has he allowed himself to live under effectively self-imposed house-arrest for the past 4 years? I can't imagine that the Wikileaks apparatus doesn't have sufficient op-s…
In the former case he might fear he releases the secret to stop the Dead Man's Switch, in the latter case his contacts might avoid him or be tortured themselves just to pressure JA, so it doesn't sound like a free life either.