Can someone clarify my situations please...
So I finally got rewarded my Bitshares from Bter.
What should I do with the remaining old proshares PTS I have at Bter? Do they have any useful purpose?
Yes, if you're saying you have PTS on the exchange you can either choose to sell them or keep them.
(If you look on Bter under PTS it has 'Snapshot_PTS_S' once you were allocated those on 28/02/2014 you were free to sell your old PTS or keep them from that date.)
Just like they got you a BitShares X shares (now trading @ a CAP of $25 million) they will also get you shares in future DAC's.
There are a lot being announced the soon. With the big ones being BitShares.P2P, BitShares Music & BitShares lotto.
They are planning to announce dates for snapshots of those shortly after the BitShare-AGS window closes in 11 days.
http://www1.agsexplorer.com/Personally I feel when those are announced PTS will rise in price so I am a buyer right now.
You may want to read BitShares latest newsletter that discusses some of these things -
http://bitshares.org/wp-content/uploads/2014/07/News-Letter-08-July-2014.pdf