Suing them and winning may not be that difficult, and you can generally sue a business even if it ceases to operate as a going concern. Collecting the judgment you win, however, is likely to be very difficult.
Still if you are going to sue, the sooner the better, because outside of bankruptcy, the general rule is that the person who is first in time to actually seize the available assets of a company with more debts than assets is first in right to those assets. Also a squeaky wheel is often the one that gets the grease. "Shaming" companies on social media often works for going concerns, but is rarely effective when a company is actually going out of business soon.
There are special remedies available against recipients of improperly diverted funds when funds are deliberately sucked out of the organization without receiving anything in exchange for its money (this is called a "fraudulent transfer"), but those cases are expensive to bring and hard to prove. Often in the case of a legitimately failing business, operating losses and not improper diversion of funds from the company, is the reason that it doesn't have enough money to pay all of its debts in full, so this remedy is not available.
Winning a lawsuit simply gives you a piece of paper stating that the defendant owes you money which you can then use to seize money and property from the defendant and/or people who owe the defendant money, if you can find either of those things. But, you can't get blood out of a turnip, and the alternative formal collection mechanism (forcing an involuntary bankruptcy) requires the coordination of multiple significant creditors and may not provide much better results if the company has genuinely run out of money, although unpaid wages are often entitled to priority in bankruptcy up to a certain dollar amount which is a preference that is not generally available outside of bankruptcy court.
There are sometimes laws that can be invoked to hold people affiliated with the management of a defunct business personally responsible for unpaid wages (sometimes the Fair Labor Standards Act (FLSA), and sometimes state wage claim acts). And, very rarely in egregious cases that affect lots of people where there was an intent to stiff you before you finished earning new wages at the company, a local or state prosecutor will prosecute a company or its officers for "wage theft".
Finally, "freelancers" often have far fewer rights in efforts to collect wages than true employees, so a mere independent contractor is in a weaker position and should consider that fact when deciding whether or not to settle.
Bottom line: consider seriously accepting a settlement because the cost of collection and the unavailability of assets to collect from once it goes out of business may make a bird in the hand worth more than two in the bush.
