Is it encouragable to purchase PM funds now?

Dont mention bout stocks, im still young and inexperienced. My target is 6-9% per year, and i am willing to lock ~20k for 5 years to see results. But most reviews on ut are bad, and it did influenced me. at the same time i did put quite some money in ASG, and provided the steady dividen of 7% still happens, is it advisable to pump in the 20k there or put in other ut like PM?