Can computers and printers be added as an asset for depreciation if used to track investments? I do not have a home business.

No, Assets for Depreciation would need to be attached to a Business of some sort (Schedule C) or Rental Property (Schedule E).

An asset is property you acquire to help produce income for your business.

Here's more info on Depreciation of Business Assets.

@user27508 

No. they would be an investment expenses that are not currently deductible for federal income tax purposes