Repair7,
I am envious of your position in KRY with you being currently in the green.
The answer to your question is more about your total portfolio, rather than your position only in Crystallex. If you are somewhat diversified, with KRY being a somewhat small percentage (as much as about 20%) of your total portfolio, and you feel very strongly about the possibilities of a positive outcome - Let 'er Ride.
However, if KRY is your only stock position (or a large percentage of your portfolio), you might consider taking the profit (one-third) off of the table, or maybe even taking off your original investment (about two-thirds) and play with the "house's" money. Playing with the "house's" money still has you holding a significant position (70k), while providing you peace of mind.
Ian brings up a good point about your tolerance for risk and your goal. It is significant and supplies a multitude of possibilities. Maybe too many... :-P . . . So, the answer to your question will likley be somewhere between all of the replies you receive.
Do not take what I post without performing your own DD.
In any event, I do wish you well in any and all trading decisions you make.
JC