I think as long as we can trade bitcoin with fiat currency then it doesn't matter, my country is still banned bitcoin but I trade on foreign exchanges and when I want to withdraw or exchange to USD then they will transfer it for a maximum of 3 days.
I feel unfortunate for people who have Bitcoin banned in their country. Not sure if I should be appreciative that someone loves Bitcoin so much that they are trading it illegally at foreign exchanges or I should be worried about you because these exchanges can enforce a KYC on you anytime. If you are asked KYC, either you fake the identity or you reveal the illegal access. Both of the options are equally punishing because the exchange can seize your funds in both cases.
When I store bitcoin in a cold wallet or exchanges wallet, the thing that worries me is getting hacked, I think the biggest risk if we hold bitcoin is a wallet that can be stolen, currently there are many malicious programs that enter PC or Android, antivirus updates do not guarantee safe , it is best to disconnect the internet frequently.
If hack is your primary concern, you can transfer your Bitcoins to a paper wallet that is kept safe and offline or just purchase a hardware wallet like Trezor.