How to choose between saving and investing your money

Does it make sense to compare long term averages of investments with the peak of savings rates?

GraniteShares 3x Short GAFAM Daily ETC (3S2P.L)

LSE - LSE Delayed price. Currency in GBp (0.01 GBP)

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935.12

-30.75

(-3.18%)

As of 09:50AM BST. Market open.