This should serve as an example to all beginners, if someone can't buy or sell their digital assets on exchanges, you have the right to be suspicious, teach them how to if you can but don't ever buy from them, it can be stolen digital assets.
Well, if we can still buy Bitcoin through other means, such as online, either from a centralized exchange or a peer-to-peer (P2P) service, or something similar, it's best to avoid buying Bitcoin from someone you know or or someone you don't know, Unless they're our relatives or family members, and we know where their Bitcoins came from, then it's no problem. There's something odd about someone we know trying to offer or sell their Bitcoin to us. They should be able to do so through an exchange or any other available option. We must be vigilant, as it's possible the Bitcoin was obtained through illegal means. Therefore, transacting with that Bitcoin address is also prohibited. If the owner of the Bitcoin were legitimately obtained through legitimate means, they could simply sell it on an exchange or through P2P. But why didn't they do that?
So, it's better to avoid this.