All is not lost if you have a judgement against a debtor, but you know they have no assets.
If the debtor has employment, you can order the employer to pay. An Attachment of Earnings Order instructs the employer to deduct installments from the salary and redirect to the debtor.
As expected, there will be limitations but the Court can order that 20% of wages be re-directed to the creditor.
So it is not necessary to abandon debt recovery action whenever you think the debtor has no assets.