The claim is attributed to JPMorgan Asset Management’s 2027 Long-Term Capital Market Assumptions. The reported figures are Bitcoin at 10% compound annual returns over 10–15 years, versus U.S. large-cap stocks at 7.5% and gold at 5.5%; WuBlockchain also reports 20.9% arithmetic returns and 55% annualized volatility (WuBlockchain).
Those figures would put Bitcoin ahead in the forecast as reported, but the 10% is a long-term assumption, not a guaranteed or realized return. The posts do not explain the model inputs or calculation. JPMorgan’s published forecast was not available in the retrieved material, so the numbers and the claim that this is Bitcoin’s first appearance in its annual forecasts cannot be independently confirmed here. The “$4 trillion” wording appears in a linked post, but its relevance to the forecast is not explained (CryptooIndia).