NAGPUR, India :Like thousands of his countrymen in far-flung places, flower-shop owner Ashish Nagose has been learning about trading cryptocurrencies by attending classes every weekday for the past two months in his home city of Nagpur in western India. Nagose bought and sold stock options earlier but is now venturing into cryptocurrencies as regulators have made it harder to trade equity derivatives in India. The 28-year-old believes the red-hot crypto asset class can help shield his family-