If you are actually sued for patent infringement, then it means you've got deep pockets to pay a judgment or settlement. In other words, you're probably making a ton of money. It's a good position to be in.
Patent trolls often go after individuals and small firms specifically because they can get them to settle as they cannot afford a legal fight. Most make the bulk of their money by without ever getting any judgements.
It’s essentially a legal-system backed shakedown.