Not really, Uranium itself isn't dangerous or even that scarce.

Super-enriched Uranium, however _is_ super rare, expensive and desirable.

Really. Raw Uranium is still pretty rare, the US got it from Congo/Canada, the Russians from Czech/East Germany. You still need a thousand tons to get a bomb and if you got no reactor to produce it for you easier.

The enrichment to weapon-grade U235 is trivial, you just need enough good gas centrifuges or a reactor.