I notice it all the time that another airline is bankrupt due to "high debts". Fortunately, I haven't had the pleasure of finding this out for myself, but when is an airline considered "bankrupt"?
I have in the past run a negative balance for a few days but always managed to get back in the black....
6 real time days without profit.
https://www.airwaysim.com/forum/index.php/topic,19499.msg92930.html#new