Nope it won't be for criminals you are just a walking pile of money waiting to be kidnap and be chopped into pieces by them.
Exactly this. If I don't carry around rolled up $100 bills up my ass why would I want my private keys on me 24/7? If I'm not willing to hand it over they'll rip my appendages off.
But it was a chip implant, I do not think it will be as visible as say carrying a physical wallet. Unless we will have a sign on our foreheads saying "carrying bitcoins, feel free to hack" I do not think there is something to worry too much?