Can I have heart attack of the cholesterol level is over 200?

Yes. A person can have a heart attack at any level of cholesterol, but higher levels make it more likely.
No prediction. Lipid profile is only a factor in the overall risk profile that we consider in the matter coronary heart disease -- on the other hand a heart attack is an accident in the cardiovascular place -- so even after making the best of the risk profile of an individual, he/she can still have a heart attack -.