What is a good portfolio for a 75 year old?

Could you please elaborate on what a suitable portfolio might look like for a 75-year-old investor? Considering their age, it's crucial to prioritize capital preservation and income generation over aggressive growth strategies. Should they allocate a significant portion to low-risk assets like bonds or Treasury bills? Would diversified equity holdings, perhaps focusing on blue-chip stocks with steady dividends, be advisable? And what role, if any, should alternative investments like cryptocurrencies or real estate play in their portfolio? Your insights would be invaluable in crafting a balanced and age-appropriate investment plan.