The manager of bitcointalk deleted my discussion in the altcoin section. In fact, I just want more people to follow bitcoin and be careful about the risks of the altcoin. There is no other meaning. But the rules of the forum are too restrictive to allow me to speak freely, and I don't like being restricted, so I may not come back to the forum to speak in the future. Finally, thanks to the believers who participated in the discussion in https://bitcointalk.org/index.php?topic=5410187.0, thank you!