When a paper wallet in a bank safe is probably more secure, why would you store chips under your skin. Plus, if criminals get wind that you have a fortune under your skin, you are at risk of being mugged and skinned. Not a wise decision to advertise this, in my view.
People intending to take this measure should by law be allowed to only store just enough bitcoin on their chip for basic expenses and not fortunes. That way people don't o about killing and skinning others just for couple of dollars worth bitcoin since it will not be worth it.
Wismeijer did not want to disclose how much cryptocurrency he has on his chip but notes that he doesn't store large amounts because of the attention he has received. To avoid hacking threats or physical threats, Wismeijer stores just enough for a few beers or a coffee.