Doubt if they ever collapse. Stop growing, maybe.
Having friends in both Ryanair and Volotea I would say that i rather work my backside off during the summer season and chill during the winter months in a Volotea base or having more or less a life with the Ryanair 5/4 than getting shafted and shifted around by the clowns in Wizz HQ all over the show with no roster, insurance, pension and worker's protection.