There are various kind of old crypto projects that has no team but still they are among the best projects today, I believe this happened because many old projects followed the footstep of Bitcoin, bitcoin would have been in tougher situations if the team or ceo is public I believe but today it's a complete different story or should I say experience? Since the birth of ICO we've seen tons of scam projects that aren't scared of revealing their faces even when they knew they are going to exit scam on investors fund, so for me hidden team members or not still doesn't make a difference..
I think the history of the birth of Bitcoin with the history of the birth of an ICO is very different. Bitcoin was born not because crypto users were enthusiastic about buying Bitcoin, but was actually created to become a digital currency. Meanwhile, ICO was born because crypto users wanted to have it, so the team easily committed scams. The big mafias are not afraid to show their faces on social media or websites, because they have control over what is planned.