When? This weekend <4000, quite possible.
I can't foresee anything like that,, below $4000 is not happening this year or even next year but that's just my observation.. This past corrections it holds only at $4100 and up and it was never down at that range.. It only means that even rumors and news against or related to cryptocurrency is not effective this days at all.. I think at this rate of observation it will make bitcoin stronger and maybe stabilize in the future..