Do Christians look for opportunities to be martyrs, sacrificing themselves like mythical Jesus?

This to them is the ultimate act of Christian faith, right? To die like their mythical hero Jesus would be an honor for them, right? If you combine this yearning for martyrism with their belief that the afterlife holds greater pleasure than their present life, it’s a bad combination and a combination of beliefs that devalues life, right? Their dogma makes them devalue their lives, doesn’t it?