Best way for the parents who don’t have any retirement plans accounts?

Hi all, I recently talked to my parents and found out that parents do not have any retirement plans like 401k or roth. They do have some stocks for daily trades for penny(like to get enough profits to get lunch. Basically for fun.) I am just little worried once they are retired. They are both 64 and just have cash holdings in HYSA and bonds, around ~500k. I was thinking telling them to buy some SCHD to DRIP/passive income. Whatbdo you guys think? Thank you

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