Buy yourself a big uncrackable safe. Load it with your valuables but leave out enough guns to be used to protect your safe.
A better technique is to put some of your lesser valuables in the safe, then “Goldfinger” the rest. That is, if you have gold, for example, machine and paint it to look like car parts in the appropriate packaging.
So when they bust in to steal your stuff, and crack your safe, they get a couple of old guns, a painting of a sheep worth $100 because of its frame, a few banded stacks of $5 bills, and an old baseball autographed Babe Ruth, in ballpoint ink.
Who is going to root through your garage looking for car parts?