Should I cancel my 25 years savings plan with GE?

Your endowment policy shouldn't be considered as paying for insurance. Treat it as a low risk investment product.

Every portfolio has room to add bonds or guaranteed products to make sure there's cashflow and cushion against market corrections.

Your GE plan works similarly to a coupon paying bond. You're investing yearly and getting some cashflow from the policy while it's still growing in value.

If you want to get into the numbers, provide me with your projected maturity benefit, total cash payouts collected and I can calculate the opportunity cost if you cut the policy now and the required rate of return required to break even from the decision.