Formula One is facing a new reality and must make deeper cost cuts to ensure the sport emerges intact from the coronavirus crisis, FIA president Jean Todt has said.
"I'm sure that a lot of teams, suppliers, manufacturers, they may have to review their programmes," Todt told Motorsport on Thursday.
"They may be constrained to stop.
"I don't want to be too confident, but I hope a few team owners or team sponsors will keep the motivation. That's why we must make sure we don't discourage them, because they may say OK, after all of that, what is the purpose? Do I still like it? Do I still need it?"
Also speaking to French sports daily L'Equipe on Thursday, Todt said the FIA would not rush the resumption of the season.
"We will not put anyone in danger to resume a championship," he added.
"We will only resume when we have guarantees that the contamination risk is zero."
Motorsport's philosophy will have to change, too, he said.
"We will have to restart from scratch and do things differently."
Teams have agreed to lower the 2021 budget cap from $175 million to $150m and L'Equipe reported that the FIA would be pushing to further lower it down to $125m or $100m.
"We will have to be determined because some are against the proposals that are essential to the survival of the sport."