Becareful with bonds and tbills..they have a very risk that the country issuing them van fefault..plus the currency depreciation is going to make nonsense of your return. Gothunguri did some superb illustration on the fx risk of eroding any gains..the we r in no free lunch in capitalism high..returns come with high risks
(1) Any country in the world can default, It happened even in Europe which has stable Fx.
Default does two things, Devalues your gov bonds with 30% and you continue earning interest or COLLAPSES the bank with your savings, Which would you choose of the two?
(2)
https://www.worldgovernmentbonds.com/That's a list of all government bonds in the world.
You can buy Aussie,New Zealand,USA which offer 4-5% incase you fear FX risk in countries like Kenya.
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https://www.treasurydirect.gov/marketable-securities/treasury-bonds/(3) The goal is not to keep all your money in bonds, have a pool of cash crop plantations like mangoes avocado sugarcane sunflower,two or three plots and then government bonds.in short spread risk.