Strike is the antithesis of a peer-to-peer electronic cash system. 

Strike reviews you, your account, and approves, prohibits, freezes rejects your transactions. 

Bitcoin on the other hand just confirms your transaction. It's permissionless.

Forget crossing the fiat/btc divide. Just swap cash for btc and once in btc, stay in btc. 

Sounds like you had a very good, albeit unpleasant, lesson.