Are you talking the Brazilian airliners? Don't know a thing about them, but my 2 minute view of them is, they're not yet profitable and they probably have too many destinations right now. Seems the only airlines right now that may be ok in the short term is JBLU.
BTW, my little rant....The Governor of Florida is pissed because people from NYC are all headed to south Florida right now to wait out the virus. He wants a 14 day quarantine for these people and I sure can't blame him.
Buy on the way up!!! Just my opinion, of course.