The decision to buy more MUST be yours, as you will wear the consequences good or bad. Depends on many factors, i.e. your time frame, cash position, risk tolerance etc
As an indication however Sentient bought into VPE at 19.5c a very short while ago (see announcements) they are professional group who make good investment decisions. They bought into QGC at 20c and sold at current price, If that gives you an indication.
Personally I've paid btw 13c and 20.5c in accumulation mode for several months, and continuing
Do more research and be comfortable with your choice
VPE Price at posting:
18.5¢ Sentiment: Buy Disclosure: Held