The 21-year-old has revealed that Chelsea, Manchester United, Liverpool and Manchester City have all expressed an interest in signing him.
Bailey still has over four years remaining on his current deal with Leverkusen and while the German club admit the winger will be sold at some stage, he will not be leaving midway through the season.
"The conversation was good. We all know that Leon will eventually leave," Boldt told Bild.
"But we have made it clear that a winter transfer is out of the question. He also knows that he has our backing."
Speaking to FourFourTwo, Bailey admits he is in no rush to leave Leverkusen, despite several teams being keen to sign him.