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there was one in 1859 that wiped out all (basic) tech they had. One in 2012 actually almost hit us, it could have wiped out all tech for an entire continent.

They are common yes, but the Earth is a small target so whether it hits us or not makes the difference.

When it happens, and indeed wipes out all electronics, I wonder what will happen. When we cannot get the power and electronics up again in relatively short time, we have other issues we have to face. I suspect in such situation were electronics stay off, we have to fight for our belongings, we have to fight for food, we have to get in to survival mode. Gold and Silver will not really help then; But we will only know when we get to that point.

Thanks for your informative comments.