550 BTC seems to be the magic number lately.
No shit! I lost 550 bitcoins too. Please donate to me. 
Bitcoin begging is so bizzare. How the hell did this community get flooded with beggars?
See Glen Greenwalds article
How Covert Agents Infiltrate the Internet to Manipulate, Deceive, and Destroy Reputations
https://firstlook.org/theintercept/2014/02/24/jtrig-manipulation/
The reputation they are trying to destroy is bitcoin's.