You're saying it is a scam because you bought at a high price and then it dropped? You realize how foolish that sounds?
The same thing can happen to you with Bitcoin. You buy at $1000 and it falls to $900. Does that make Bitcoin "a scam"?
As for the rest of your claims ("coinbase will not add", "hardfork is not coming" - both are false and unsubstantiated).
The truth is that developers are playing their tricky games.
They feed us with this
fake news trying to create the volume to dump their premine! That is why it is a SCAM.
Your repeating the word "scam" in caps, over and over, doesn't make it more real.

You made a bad trade, and now you're in a bad mood. That's all there is to it from what I can see. Shit happens, happened to me many times.
Instead of buying and trying to sell ASAP, you should have PoS staked and made more coins that way... my advice.
That's why I don't do short-term trading anymore... only long-term HODL+PoS. Worked great with DCR so far.
Nobody is trying to dump anything - the coins are locked until February 2018
DCR's uptrend is based on real technological features.