I wonder if trade volume of CENT has something to do with the XPM price. On December 31 - January 5 period, trade volume was huge and XPM price was doubled. It is also increasing now.

That discussion between the developer and owners of CENT is really pointless.

Developer is not responsible for the value of the coin, promoting it, contacting with exchanges to trade it, trying to create a purpose of it etc. He is already adding a great value with fixing and maintaining it. I think no one wants to damage or offend something that they added value but it must be really annoying to be accused by something that you are not responsible for so Catman's reactions are understandable in that situation. Attacking developer changes nothing other than damaging the coin.

Basically, you should stop it.

  

c) Should I do something with them before/after 08.01?

After the POS reward will be limited on 8th January, an increase in prices are expected in the following days, so you can keep them if you think that way.

TRK satışı yapan arkadaşların fiyatı nasıl belirlediğini öğrenebilir miyim acaba? Genelde 1 TRC 0.001 BTC civarından satılıyor ve piyasa yeni çıkmış bir altcoin'e göre bu fiyat bana biraz yüksek geldi.

If you think about the difference between buy and sell orders, fees charged by exchange markets and the cost of services you use for converting fiat to Bitcoin and Bitcoin back to fiat, Bitcoin is not the perfect option against VISA & Banks. For now.   

Everyday i read at least 2 good news about Bitcoin; a new store accepting Bitcoin, new Bitcoin ATMs installed, a new altcoin having media attention etc. Also China is buying again, so if something extraordinary doesn't happen, like Federal Reserve launches it's own cryptocurrency, banning Bitcoin, it will go back up to $1200 probably.