Personally, I think aquiring as many off-grid skills as possible is a very wise idea.
With the debt bubble, declining dollar, the European economic crisis and other economic storm clouds looming on the horizon there is no guarantee that all will continue as it has.
What I am shooting for is not being completely off-grid per se but to reduce grid dependence and not be utterly dependent on the grid for day to day necessities as if it were some sort of life giving umbilical cord without which you would die.
I have been taking incremental steps. Step one was sending my old pickup truck off to the junkyard a year and a half ago. For commuting and getting around town I can ride my bike or use public transportation. For long travel there is the bus, train, shuttle vans, or rent a car.
I am much more financially free now that I have turned to alternatrive modes of transport. No more fuel, insurance, or expensive repairs.
Another incremental step I am taking is to try to reduce dependence on the grocery store. Being an apartment dweller I cannot grow food but what I do is buy veggies and side dishes from the store but try to get as much of my meat supply as possible from fishing and hunting.
I am looking into finding areas where foraging for wild edibles is legal.
One has to look at the psychology of grid over-dependence. Many people are so utterly dependent on the grid that they have completely forgotten how to live without it. If it goes down for even a day or two they start to panic.
Also disruptions like rising fuel and grocery prices can cause panic.
In my former career in heating and air conditioning I dealt with people like that all the time. If their furnace went out and I ordered the part and found out it wouldn't be in for two days they would go into a tizzy fit.
They never bothered to prepare by having alternate forms of heating.
Grid over dependence leaves people vulnerable to any number of scenarios from economic recession/depression, natural disaster, civil unrest, tyrannical government etc.
Look at how many people's worlds were turned upside down after the Bear Stearns crash in '08.