I've lost my job, now I've got nothing to do.
The world is changing as we know it. Our personal lives included.
First of all, in answer to the title: wrong. We've all got something to do and we all should do it.
If you've lost your job, you haven't lost everything. What you need to know now, is that you have the time to gather what you can. You are are now in an opportunity to assess your situation, make a note of what you do have and what you can choose to do.
You might be in a service or industry that is no longer operable due to the current situation (COVID-19). Is it possible you can use this time to do something you have never attempted?
If your job is hands on, now is a good time to do something hands off. Broaden your horizon by getting out of your routine and comfort zone, by picking up that book that's been sitting unread on your shelf and dusting off the cover. Make a blog, make a meal plan, do something unknown
People around you are in a similar situation. Some people have no immediately foreseeable prospects. Where work for you once was, is now no more. This is not necessarily permanent, we are all capable of picking ourselves up and by transitioning into something new or returning at. a later date. Another scenario to imagine is that you can re-enter your work force in different state. You can come back with some more expandable knowledge. Many skills complement each other, and by knowing this we can take impactful steps to increase our working capability.
You don't need a positive mindset to be productive and to make meaningful change. What is highly recommended is a routine, discipline.
Your motivation might be out of whack and severely lacking. It doesn't mean you can't do anything. It's up to you to emerge from the ashes our tumultuous lives are leading to with new perspective, a fresh set of skills.