Where to invest my 10 dollars ?

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I just got 10 dollars from my weblo account when someone just bought a property of mine for 10 dollars . Now i am in confusion - where to invest these 10 dollars ? Should i upgrade my bux.to account ? or adbux ? or buy income4beginners etc ?? Whats ur opinion friends ? Please give me a suitable reply . I want to make this 10 dollars to a much larger amount.