Well, maybe

“Quote of the Day”

“Carry a 25 if it makes you feel good, but do not ever load it. If you load it you may shoot it. If you shoot it you may hit somebody, and if you hit somebody, and he finds out about it, he may be very angry with you.”
– Col. Jeff Cooper

https://gunfreezone.net/page/2/

I have never fired or even held a .25. It probably makes a loud noise. Sometimes noise will send your attacker running. For that matter, there are many incidents when the mere sight of a defense firearm sent running the potential attacker. In order for the pistol to make noise, though, the operator must pull the trigger. That action sends a slug somewhere. Your target is the preferred place to put the slug.

There are many, many studies and writings on the best defensive caliber and weapon, from .22 lead to 12 gauge slug or shot. Every caliber and every firearm has its defenders and its detractors.

What it comes down to, you want: a particular pistol that fits your hand and your needs; a pistol that will fire, eject and chamber every time you pull the trigger; a pistol with which you can place lead in a specific target at least 80% of the time, preferably 100% at distances less than 50 feet; a pistol you are ready and willing to use.

So carry a .25 if that is your choice. And, learn to use it. Learn to use it properly.