What IPA sells the most?

Could you please elaborate on the context of the question "What IPA sells the most?" Are we referring to a specific market, region, or time period? In the realm of cryptocurrency and finance, IPA is not a commonly recognized acronym that directly relates to sales figures. However, if we assume that IPA stands for a particular investment product, asset, or platform, the question could be asking about the most popular or best-selling IPA among investors or consumers. Given this assumption, a possible questioner's tone might be: "I'm curious to know, in the current market landscape, which IPA investment product, asset, or platform is experiencing the highest demand or sales? Are there any particular factors driving its popularity, and how does it compare to its competitors?