Depends on the type of crazy.
Is crazy heriditary?
Not in my case, Otis. My parents were relatively sane.
Yes! My dad says you inherit it from your kids! LOL!
In some cases I would have to say yes. But we also have to consider others factors like our environment and the pressures from society. I know I look forward to a time that is mentioned at Isaiah 33:24: "No resident will say, I'm sick." This will include physical as well as mental illness. I myself look forward to the time when I am in perfect mental and physical health.
Yes, yes, yes! My inlaws are proof of that.