What you're talking about is infrastructure. How does infrastructure get built if people aren't actively building it? Yeah, these things take time, but people have to actually build out these ideas first before others in the future can build on top of them. Amazon sold books online because it's all the internet infrastructure could handle at the time. That's why MakerDAO made DAI because it's a low throughput d-application that doesn't require scaling through upgrades in infrastructure. Give it time. This space isn't a scam, it's just very early, and people are enthusiastic, as they should be.