Liquidator Grant Reynolds has downplayed the prospect of recovering money from the start and said last year that chasing Kairua may be a "fruitless exercise".
Reynolds, however, said in his latest report out today that investors are discussing whether to pursue Kairua "including applying for him to be adjudicated bankrupt".
Kairua, who is in his mid-50s, said last year that he had no money left.
The director represented himself during his sentencing, during which SFO prosecutor Nick Williams call the gold trading "a bogus, fraudulent scheme".
Kairua, however, said he was "well and truly duped" by his former trader Elijah Geldman, who was jailed in the United States for an unrelated fraud.
After firing Geldman in September 2011, Kairua took over the trading himself but was inexperienced in dealing with precious metals.