Brazil has banned closed pension funds from investing in crypto assets due to concerns over volatility and potential risks to retirees' savings.Large pension funds like Previ and Petros, serving millions of retirees, are affected by the ruling, which aims to protect their investments.While crypto investments are restricted, alternative investment options like agro-industrial funds and infrastructure debentures are still allowed.The ban on crypto investments in pension funds contradicts Brazil's 2022 crypto law, which aimed to regulate the digital asset market.