I'll go after this because it ties into a pet peeve of mine with too many tv scripts.
"...proving someone is the owner of a given bitcoin wallet is much harder to do than to prove a person is the owner of a bank account..."
Going down the "prove it" road with the police is just bad news. Too many times it screams "I'm guilty but haha". If you're innocent even though a conspiracy of 4 people framed you, do get that good lawyer but then claim your innocence and let the "episode" unfold.
If you get all "come and get me and try to prove it", then you make an error, you're hosed.
One of the cool things about some of the homicide shows is occasionally the interrogating detective will say "look, we've got you on x financial offense, but we need your help as a witness so we'll reduce that as much as we can, maybe to community service plus restitution." But if the suspect gets all smug, even when innocent, then the cops just get grumpy and go for the 5 years in prison max penalty.