I wouldn't spelling it "Chrystal" either then.
Personally, my feeling is a child will get picked on for something. As long as the name isn't too easy or terrible (you know, Seymour Butts/Ivana Humpalot sort) then you are okay chosing whatever.
That said, I'm not a huge fan of creative spellings. I do like more unique/less popular names, but I don't like made up names. I like to think of the name as it sounds on an adult, not just a sweet little baby. And I like names to be gender-specific. I know lots of people like it, but I hate seeing little girls named Taylor and Aiden and stuff like that. It doesn't have to be a froofy name, but I like my girls to have a girl's name, you know?