Bhanwarlal Doshi, a Delhi billionaire has given up his over 600-crore business empire in a bid to become a Jain ascetic. He became a monk on Sunday under the discipleship of Jain Acharya, Shri Gunratna Surishwarji Maharaj. Father of three, Doshi had reportedly been planning to take 'diksha' since 1982 after Jain lectures drew him to spirituality.