Hi,
I have few questions please:
What's special about this coin?
Is the dev still around? last time was active was mid July?
Is it worth mining this coin
Last time I was active was Aug 1

To mine, you will need a large amount of hash power - last I looked, there was 3.21 GH total network.
If you had 30 mh going for 24 hours, you could get around 0.1392 BTB (at current rate about 0.00071016 BTC worth)
I think what makes Bitbar special is there are only 500,000 total bars to be created. Much more rare than your average coin.
The PoS reward is 5% annually, to help keep up with inflation and give a little interest - like a savings account.
It take 520 confirms on a mined block - about 3.5 days - this helps to keep people mining and dumping (I hope).