One of the biggest market debuts of 2024 is also one of its biggest gainers.Most of the companies that went public this year are struggling to stand out. Buying an IPO can be risky. However, 14 of the 186 debutantes of 2024 have more than doubled. Most of them are obscure, but one of this year's biggest rookie winners is a familiar household name.Shares of Reddit (RDDT -3.50%) have more than tripled since the company went public at $34 in March. The online forum that bills itself as a community of communiti ...