Younger investors are thinking about their investment portfolios all wrong, and it’s not entirely their fault. Ultimately, it’s up to them to recognize where the best long-term returns lie before too much precious time is wasted.

The mistake they’re making is replacing stocks and bonds with more questionable stores of value, such as watches, sneakers and rare cars. According to a recent survey by Bank of America Corp., about 94% of wealthy millennial and Gen Z investors are looking to invest in collectibles, and many of them already do, apparently because stocks and bonds don’t pay enough.