The longer it takes the more it generates revenue for liquidator et al and they will make sure to exhaust any value leftover to secure their fees. That is their priority and then they see what's left for the creditor. This process can go on until the trust is wound up and can last years depending on the complexity of the case. Cryptopia seems to have taken a bit longer than the norm probably due to the amount of accounts there and a time threshold for holders to engage with the claims process.