On a different.. wall observing kinda note, the UK annual self assessment tax MUST be paid by January 31st. Im sure many people that spent well in 2017 (knowing they had massive BTC profits to fall back on) didnt really plan ahead so needed to cash out a few Bitcoins to pay their tax bill... Im one of these people. I cashed out at £10600 (approx $14k) but Im sure others have been holding to the last minute hoping.... it goes a bit higher than now...
31st Jan payment deadline is for tax year 16-17, so CGT on sales
before last April
Edit: so your tax is due Jan 2019. No rush.
This wasnt my Capital Gains. This was just the tax on my self employment that I frivolously spent on hookers and blow rather than saving for my tax bill. I have CGT to look forward to next year.