To me this is classic head and shoulders pattern - we should prepare for further losses in the next few days.
A lot of the 'non-traders' are going to lose interest and cash out if they have made a profit, or cut their losses if they bought at the top. Things will become more stable after Xmas IMO and we'll be back to business as normal, most of us will be happy when we buy in at low, low rates.
As for the tax issue, this has always been the biggest threat IMO - they will introduce it quickly and I wouldn't be surprised if it's given it's own special status with rates somewhere above the normal capital gains / commodity tax rates.
I still love the concept of bitcoin and even though I see big challenges ahead I'll be investing again when it reaches a reasonable rate.