In general no
From a market value perspective altered cards in general are poor investments. If you were talking just about any other 52 there wouldn't even be a "but", but you are talking about a 52 Mantle - the poster card for post war cards. If you get a nice eye appeal "A", I think you'll be okay.
For myself, I would tend to make exception for a super rare card that doesn't get offered sooner than one I couldn't currently afford.
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