why the qtum price is went down?
It is just a pre market speculation with IOU tokens on chinese exchanges.
It means nothing
Do you think it will drop on release ?
I don't see any good reason for it to drop on release. Trading volume will increase significantly. It will grow bigger in the West, especially if Poloniex offers it, which I imagine they will. Additionally, most people who bought in at ICO are able to sell now through IOU trading if they would like. It seems to me that there's no reason that anyone who was planning on dumping hasn't already dumped in IOU.
If this thing gets listed on a western exchange I think it easily doubles as long as Patrick & team keep executing on both the code and showcasing the potential of the platform to prospective users / companies. There is clearly a significant amount of interest from Westerners here and I don't know many US citizens that got in..