More risky than with the products worth that cash?

Yes. Cash is fungible, has no transaction costs and negligible transportation costs.

Yes, that's a reasonable argument in its favour; I don't necessarily disagree. It's worth acknowledging though that not-cash has advantages (to a robber) in tax evasion/laundering.

Not-cash is probably harder to steal, but I'd have thought it preferable. (To a robber.)