If you haven't already sold your ALTs simply hold if your project is decent. If the project has no future sell and buy into a decent project. This is all you can do to recover your loss without putting in more money. It will probably take a couple of years to recover your loss!
Some ALTs will never recover from this crash!
It is an ugly situation!
I am doing this, HOLD some coins that have not been exchanged, hoping that the next few years can be exchanged. although it is very heavy, this is the best decision that can be done at this time.