From abc13.com:
Texans who are 55 or older are more likely to get concealed handgun permits than those who are in their 20s, 30s and 40s, according to Texas Department of Public Safety statistics.

That falls in line with national surveys that indicate seniors are more likely than any other age group to be gun owners.

In Texas, 42 percent of those who have concealed handgun permits are 55 or older. Texans who are 60 or older have about 25 percent of the permits issued, statistics show.
Makes sense to me. The older you get, the more you come to the realization that you're not immortal and bad stuff can happen.