I believe a combined approach to your finances is the right answer.
FWIW I have transfered my mortgage to a 15yr fixed term with the intention of repaying it over 10 if possible, even if I lose the ability to pay later, the prior overpayment will proviode a buffer. The amount is low, so once my other debts are cleared by the end of the year, any work will cover the mortage payments.
Clear all debt that you can, & then use the excess cash to buy useful things for the future, including self sufficiency systems & trading goods.
For self sufficiency, I'm building a small battery bank that can be used to run my central heating system electrics, a water storage & cleaning/filtration system. Remember you can live for a month without food & only days without clean water ! Oh & build at least a months food reserve !
Back to the subject at hand, I read an article the other day (
http://321energy.com/editorials/rubin/rubin041505.html ) that showed the authors calculated predictions on depletion, assuming his figures are correct & an avaerage 84mbpd consumption, it equates to reductions in world supply as follows;-
2006 = 4days
2007 = 1week
2008 = 2weeks
2010 = 39days
The 2010 figure is interesting, if correct, it means knocking over a months worth of supply out of the global demand & that is at todays consumption rates or a reduction to 75mbpd i.e. a 10% reduction in consumption. That is still using all the oil available on a daily basis ! Bet the price goes up more than 10% in the same period !!!!!