GameStop plans to raise up to $1.3 billion through convertible debt to boost its Bitcoin holdings.The company will issue $1.3 billion in convertible senior notes with a 0% coupon and a five-year maturity.GameStop's stock dipped by 8% in after-hours trading after the announcement of the fundraise.Wall Street remains skeptical about GameStop's move, unsure if the Bitcoin investment will impact its stock price positively.