By the eve of this Christmas, the market capitalization of HSBC Holdings has successfully surpassed HKD 2 trillion, with its share price continuing to hit new all-time highs! "Christmas bell, buy HSBC," a popular investment saying in Hong Kong for over 30 years, suggests buying shares of HSBC Holdings around Christmas time (late December to early January) for potentially favorable returns. Does this strategy still hold? Would you buy HSBC?