LadyRuby,
Yes, from time to time Carlin gets a glazed over look in his eyes and tells me he doesn't want to talk about it anymore. At least once in the last six months, he's gone on strike on me and crashed for a weekend on the couch instead of helping with the animals and garden. He said he was "tired of farming"

.
On one hand, he understands the need to prepare, and on the other, he doesn't want to think about all the conveniences that will be lost or hard to come by. Some days he wants to just get up and go to work without thinking about anything but what's on his plate that day. Some days he'll dive in and help setting up some system that we'll need.
It's all ebb and flow. There are certainly days I don't want to think about it either. Once in a while I wish I didn't know. Then reality sets in, and I'm glad I
do know and have time and some limited means to prepare.
When my husband doesn't want to hear about it anymore, I give him a break. I just drop the subject in conversation. But, I don't stop preparing. Actions speak louder than words, and he sees how seriously I take this. Just about the time I'm ready to give up on him, I'll hear him mention something about peak oil to someone else. He never uses those words, but he talks about having a garden, animals, alternative light and heat, etc.... telling people there will be a time we'll NEED this stuff - and those who don't have it will be screwed.
Maybe your husband is taken aback some precisely
because you have never been the worrier. Perhaps he doesn't know what he should do (do any of us, really?) and so he sits and does nothing.
I don't know much about investments - stocks and such, but I invest my money and my time in my homestead. I figure in the long run it will have the best return. Yes, I'd love to have extra money, but there may indeed come a time when money is not worth the paper it's printed on. My land value may go down, but it's paid for and I'm not selling, so it really doesn't matter to me. As long as it's productive land, it will give good returns to me.
Think about what you can do to prepare short of worrying about those investments. Take small steps to prepare. Doing something -
anything - will make you feel better than sitting around worrying. And, it might have the added benefit of making your husband see that you take this very seriously - and haven't just developed an interest in your investments.
Kathy