There are many reasons for people holding hands, there is love, there is for friendship, there is a reason just for signifying unity.
It is normal to try holding hands with someone you know if the matter comes that you must but if there is no reason to, it might not be that okay.
Nevertheless, when you find the person that matters the most to you, it is normal to try holding hands with each other for there is something about holding the hand of the person you love that signifies and transcribes that you feel for each other.
Here are some quotes about holding hands that might help you out.
And we may stumble and even fall but I swear I am going to hold your hand every step of way.