I'd advise your clients to read this first, just in case they have better forecast models:
Bloomberg:
Here's What Could Drive Gold to a Record in Next Two Years: Top Forecaster
Rising inflation and sagging confidence in the ability of central banks to revive global growth will drive up gold, according to Incrementum AG, which says bullion could climb to a record in the next two years.
Gold prices could recover to $1,365 an ounce this year and even increase to above $2,000 in 2018, surpassing the all-time high of $1,921.17 in 2011, according to Stoeferle
To read the entire article, go to
http://bloom.bg/2e3WgOF
Personally, I've always thought all those years of QE pumping money into global economies is going to catch up with the world one day. Hyperinflation is the only logical conclusion IMO.