The interest rate gets changed every 6 months depending on the CPI. The $10k limit is per year - so if you hold on to those bonds you can potentially have $300k

The interest rate gets changed every 6 months depending on the CPI. The $10k limit is per year - so if you hold on to those bonds you can potentially have $300k invested in total. As the parent comment stated - this isn't meant to get anyone rich. This is the government providing a service that allows (working-class) individuals to keep a rainy-day fund relatively insulated from risk. If you're able to save more than 10k per year, you're not the primary target for this service.