The bytecoin domain name is three years old but if you look in wayback there was nothing related to the coin (or at all) on that domain until much more recently. We have no idea where the domain came from, it could well have been held by a domain speculator for years.

Again, I'm looking for verifiable evidence in support of the extraordinary claim that a secret of this magnitude was kept by thousands of people for two years. I don't see it, therefore I don't believe the extraordinary claim.