What do you think Wilder will do next to try to salvage his career now?
The only way he can fight for the heavyweight titles now is by becoming a mandatory challenger and that can only happen if he wins a couple of comeback fights.
The first thing Wilder should do is to have a good rest. He shouldn't be thinking about boxing for at least 5 months. He needs to recover. A lot. He's badly beaten emotionally. He needs to enjoy other things outside boxing. As soon as he gets back, he should have already accepted his defeats. Failing to accept them will only make him lose more.
Wilder's next fights shouldn't be title fights. But he's got a lot of choices. There's Joshua, Whyte, Pulev, Ruiz, and others.
Does Wilder even still have it in him to retain a high level of dedication now after Fury showed him over 3 fights exactly how inept he was when confronted with a superior colossal fighting machine (in Fury).
Fury is a different class of fighter. Wilder still got his powerful right. He could still put other heavyweights to sleep with it. But it all depends on his recovery. If he continues to cry over his losses, he can't move on and start climbing back at the top once again.