Oh, I understand blockchain quite well. Well enough to see when it's forced into the role of DHT or some other protocol/structure that by itself was cheap and efficient.
> Can you explain how can I make trusted mmo lifecycle database if the system requires anyone can participate the node? I think you can't solve. If you can, explain it.
With the vaguene requirements you have used here, just put a digital signature on the data and you're done.
As I said, you haven't described why you need blockchain in particular. You try to defend it by saying that you don't see any other way to implement a distributed data store for your game, but it means nothing, especially with the numbers of people blinded by blockchain hype. If you used just about any other distributed protocol, I wouldn't even bat an eye, but with blockchain you don't get the benefit of the doubt.
> I think that you are feeling good when you scoff something new.
No, just when I scoff somebody who uses the wrong thing in the wrong way for the wrong reasons.