I don't understand how the police would even be able to seize the money in the first place, or even be able to know know about the money. If a person is aware of their rights then they should not have consented to a search (there are very few reasons to ever consent to a police search, and you should withhold consent in 99%+ of the time).
I am also surprised that this has not been challenged constitutionally as these laws would likely deprive people of their 5th amendment rights to due process and the right to receive just compensation when the government takes your property.
I agree that someone with bitcoin would likely result in their bitcoin not being seized as long as there is a backup of your private keys in a location apart from you and there is sufficient security on your phone/wallet to prevent the police from sending your bitcoin to an address they control.
I was stopped once and the police asked for permission to search my vehicle. I said "no". So more cops showed up. They pestered me and I said "no". Eventually there were about 10 cops and the last one came up, told the rest to search my vehicle. One cop told him that I refused to give permission. This last cop, who seemed to be in charge, laughed & said "We are cops. Search his vehicle, if we find anything, just claim he gave up permission."
BTW, I had nothing illegal in my vehicle.
My uncle is a retired cop and he use to brag about lying in court. And he wonders why I hate cops.