I follow aurora coin from the beginning. I still hold a big amount of coins in cold wallet. I am wondering what went so wrong with this coin and the price is going lower and lower...

Basically a number of things are going on:
- Cryptos are in downtrend after the rally last year.
- Adoption of Auroracoin in Iceland is slower than initially expected.
- The reformation of the Auroracoin foundation to a Crypto foundation probably has caused some panic among people.
- From the beginning Auroracoin has been put "on the market" wrongly. See the initial article in the Steemit link that describes this.