Photos show cocaine horror
Here is a site that shows you what younger people look like after they have been on crack for a few years.
You didn't say how long your husband has been involved with crack. Since he's 58 now, most likely he will be dead very soon if he continues with this drug abuse. Cocaine and crack contains toxic chemicals used to make the crack. These chemicals will literally rot all the teeth out of your head as well as "eat" your body from the inside out. And this includes your mind.
Yes, you are definitely in danger. As NoHelp said he could beat you to death and not really know what he's going.
And since he's adding other drugs to his repitoire - he's looking at attending his own funeral probably within a 3-4 year period tops.
You probably won't be able to stop him as he's rather old to be dabbling in such a putrid drug.
Yes, find somewhere else to live and take all your belongings while you still have them. He will definitely help himself to whatever he can pawn or sell to buy more and more drugs.