It's unfortunate so many bitcoiners are delusional to this "decentralized" hype. 99.999% of people don't get a pile of elephant feces about decentralization. No one cares. As far as they're concerned, big banks are a lot more trustworthy than some anarchist internet nerds.
Do you really think that people will one day wake up and realize how glorious decentralization is and how it will solve all of the world's problems? Please.
If bitcoiners actually thought about things from an objective and realistic perspective, and took steps to ensure bitcoins success, I think bitcoin has a good chance. But if everyone is so delusional, then bank or government crypto is going to completely overtake bitcoin, and bitcoin will either die or just used by a few anarchist/libertarians.
Banks probably have a worse reputation right now than at any other point in history. People only put up with them because they don't think there's an alternative. They don't need to "wake up and realise" anything, they just need to see something that works and provides a practical benefit and that's what we're working towards.
Also most people don't give a crap about anything important, which is why everything is celebrity gossip and reality tv these days. That doesn't mean we should stop doing what we're doing and it doesn't mean we aren't going to see a surge in use in the future.
Your post also assumes the global economy getting better, but not all of us see that happening. Since banks now have their dirty little fingers in so many pies, all it takes is for a few markets to take a downturn and they're suddenly in deep financial trouble. If more bail-ins like Cyprus happen, you can bet people won't be prepared to tolerate that and will be looking for a way out.