I see all issues with airliners short-term. Would not invest in them either.
Concerning Boeing I am a bit more positive long-term. If Boeing is able to fix the 737 Max issues with FAA the stock could jump out of the current depths. Test flights with FAA people on board have been restarted yesterday.
In addition Trump will not allow Boeing to go bankrupt the coming 4 years. The new ordered Airforce 1 will not become an Airbus 1…
The world also needs two capable aircraft manufacturers for other reasons: dual sourcing, healthy competition, risk reduction so that one design flaw does not stop the world from flying.