Ok, so I'm about to get a 60 gallon tank for my bettas. I would house 5 in it. They would each have an equal amount of space. I heard from someone that when males constantly see each other it shortens their life span. Is this true? My priority is to make sure these fish are living the dream...

Alright so I have a 5 gallon aquarius tank that currently is home to my spunky VT and one little ghost shrimp. They get along just fine, other than when the shrimp tries to hang out in my betta's favorite hiding spot. There is white/opaque dumbo DT at my petco that I've absolutely fallen in...