Americans may be living longer, but many say their retirement money feels off-limits. A Retirement Pulse survey from Prudential finds that 86% of respondents don't feel comfortable enough to dip into their savings for "things they enjoy." For those with at least $500,000 invested, the percentage is still 61%, reports Quartz. More than 3,000 people age 50 and up were queried. Other takeaways: