People with skills and trades will almost always find work even in shitty economies. If you know how to make something, build something, or fix something that everyone uses, then someone is probably going to pay you to do that.
Not necessarily. The construction industry (at least in my country) has traditionally suffered from a nasty boom-bust cycle. A few years of flat out work struggling to find/attract/train talent, then a few years of struggling to find work and having to lay off that same talent. Who then move overseas and then the cycle starts again.