Could you please elaborate on the possibility of purchasing cryptocurrencies using a prepaid card? I'm interested in understanding the feasibility and potential challenges associated with this method. Are there any specific cryptocurrency exchanges or platforms that support this form of payment? Additionally, could you discuss any potential limitations or restrictions that might apply to using a prepaid card for crypto purchases? I'm also curious about any potential security concerns or fees that might be involved. Thank you for your assistance in clarifying this matter.