Is Vtec safe on an older Civic?

Mrs has a 2012 1.8 iVtec as her daily which I drove for the first time yesterday. FSH serviced religiously every year. 80ish k miles. Just wondering if it's safe to be revving it up to 5000+RPM? I know it's designed to handle it and it sounds good when you do but I'm just not used to an engine revving out that much to get power out of it