The Treasury Direct website will help you figure out what you have and what they’re worth.
If these are paper bonds issued at 50% of face value then they probably are still accreting toward that face value and are earning an implicit rate of interest that is greater than anything available in the market currently. Keep them until they hit face value and stop rising in value, would be my advice.
Other savings bonds earn variable interest, meaning that today they are earning literally close to nothing. If you have something else worthwhile to do with that money you might as well do it. 00.10% interest is not enough to turn anyone’s crank.
WTF is an implicit rate of return,curious.
Either it is or is not