Let’s say optimistically that you die at 70. That’s 30 years living on 300k, so 30k per year on rent, food, utilities and medical. You could live indoors for that amount in some parts of America in 2023. But what about in 2053? Inflation could have a huge impact on your cost of living and if you’re already living close to the bread line it’s hard to find savings anywhere. You could put your money in stocks but likewise you’re at the mercy of the market. It might be fine but if the market tanks when you’re 65 you could be in big trouble.