It really depends on yours and your cat’s opinion. Weigh the pros and cons and decide then.
The bells are cute little helpers. They make it easy to locate your kitty that got lost wandering in the house. Also, they can save the life of small animals that your furry little predator uses for food.
In a bigger cat community, if one cat starts bullying the others, a bell on his collar will serve as a warning to the weak members and give them a chance to get away.
On the other hand, bells are injury hazards. If your cat doesn’t fancy the bell, she will try to remove it by teeth or claws, that can lead to injuries and/or choking hazards if the bell is too small. Bell noise can and probably will start to irritate both you and your cat.
Cats can even get seriously stressed after some time. And the fun part, when hunting, cats prowl on their prey in complete silence, so when the prey hears the sound of the bell, it is usually too late.