That's only a speculation but it seems to me that it's very impossible to be realized. Just take a look at the graph of bitcoin in the last 4 months and see how many times bitcoin has fallen down to 6,000$ mark but it didn't went deeper down that mark anymore and to think that it will go down to 1,800$ is never going to happen.
I agree there was a huge wall at 6k so I dont think it will pass below that , nothing is certain of course but looking at the chart as you said it is just impossible to happen .Many said that bitcoin will be dead however it still manahe to survive , There so much potential and bitcoin so let us just wait and we will see an uptrend in the near future.