The angle the advertiser is using is people in India traditionally and culturally highly value gold as a SoV and showing one BTC is worth almost one Kilo of gold highlights the equivalency. Asian people generally have more open physical gold markets and a strong tradition of holding gold where buying and selling gold provides healthy competition with the states fiat. Early adoption of Bitcoin was strong in Asia because of this and especially large young internet native populations and often lack of reliable equities markets. But many Asian governments moved to limit and restrict this new competition with their fiat shitcoins coming from Bitcoin. Thailand, S.Korea and India in particular. More recently since Trumps second term some of these restrictions are being reduced.