I am having wordpress website. And often account get suspended of high CPU usage. Can my hosting account get suspended if I get good traffic on website?
Those WordPress suspensions are mainly due to faulty plugins/components not due to traffic.
There are ample resources on free servers to accommodate a good traffic.
If you still get suspended due to HRU(traffic), then you may always consider x10 premium. http://x10premium.com/hosting.php
Also you won't ever get banned. We will recommend you upgrade if you get enough traffic to cause repeated suspensions, but there are always alternatives, You could switch to a pure html website.