It is very interesting what you explain, but in my opinion, if the world never knows what Crypto is, it will probably be like normal. There are still many other ways to make digital transactions, the same was before the creation of Crypto. Everything is completely manual. But even now, there are still many people, who still don't know whats a crypto.
Hard to tell. But I believe if bitcoin was not created, there would be another substance which is capable to replace bitcoin. It will be named different with a different shape. blockchain would also be created but with another name. Actually, there is no realistic application of bitcoin yet. So there are people who do not care about it