The semiconductor bellwether's stock recently got a massive upgrade, pointing toward better times ahead.The past year was rewarding for ASML (ASML +1.26%) investors as shares of the semiconductor equipment supplier shot up 73%. Investors have been buying the Dutch giant's stock hand over fist of late as its order book swelled to meet the fast-growing demand for its advanced chipmaking equipment that's used for making artificial intelligence (AI) chips.Investors may now be wondering if it is a good idea to b ...