To invest in insurance education policy or fixed bank deposit depends the benefits that you will get at the end of it. The only reason why I recommend fixed deposit over insurance education policy is that education policy is not flexible and the returns are low (2 to 5%) (looking at it from an investment point of view).
I&M has the best interest rates when it comes to Fixed Deposit (
https://www.imbank.com/interest-rates)
Alternatively you can invest in CBK long term bills and bonds that attract about 10% interest rate without any hidden terms.