A joke

Although this sentence did not announce the reason why Roger laughed, in the following story, Oda implicitly mentioned that Roger pirates landed on the final island prematurely and it would take 20 years to get the big secret of the final island. Moreover, Roger also said that it must be his son who finally got the big secret. At that time, Rowley laughed at Roger for not having a son.

This explains why Roger's pirates laughed after landing on the last island. You know Roger, the pirates had a hard time finding the last island. Even Captain Roger was dying and didn't give up looking for the last island. It is estimated that it is also because the country of peace is closed to the outside world, and people outside know nothing about the country of peace, otherwise Roger would not have lost his last two red history books for so many years. Now he has discovered a big secret, but it is not the time for him to be born. Who can accept it?

Finally, I asked Roger if the so-called big secret treasure existed before he died. Xiao Ai thinks it should exist. After all, Roger himself said that they came at a bad time, and the big secret treasure will not be born until 20 years later. It can be seen that Roger also thinks that this so-called big secret treasure is true, and Roger also intends to let his son take it away. But now that Ace is dead, Luffy, who inherited Roger's will, will take this big secret away.

Moreover, when Roger died, he not only revealed the existence of the big secret, but even the strongest white beard among the four emperors ruled the white beard of an era after Roger. When he died, he said that great powers did exist. This should be what Roger and White Beard said. It's just that this so-called big secret is not necessarily a real treasure, but more likely a secret of the world, such as a blank century-old history, the meaning of D and so on.

If you really want the treasure, the straw hat pirates can get countless treasures in the Golden Town of Empty Island, where almost all the gold is cast, and Luffy only took a small part, so really, the straw hat pirates really don't care much about the treasure. Although the big secret is very attractive, Luffy probably cares more about the fun of adventure!

In Xiao Ai's view, although Roger named this ultimate knowledge "Ralph Drew" as a joke, the name should mean a satire on what happened to himself and others. After all, they tried their best to go to the last island, only to learn that it is not the time for the big secret to be on the earth. You said it made Roger and his wife very depressed, so it was reasonable to choose such a name. As for the big secret treasure, it should be true, but it was not born when, and this so-called big secret treasure may not be true, but it may be the secret of the world!