By Hyunjoo Jin and Akash Sriram (Reuters) -Elon Musk said on Friday he planned to “significantly” increase childcare benefits at his companies, including Tesla Inc, and that the details would be likely announced next month. His comments came a day after Musk tweeted that he will do his best to help the underpopulation crisis, following a media report that said he had secret twins with one of his top executives. “Kids are worth it if at all possible. I’m planning to increase childcare benefits at my companies significantly,” Musk said in a tweet https://bit.ly/3AFavSj. The billionaire, who has …