Again :
Bitcoins is far apart from traditional currencies, the fact that you are worried about it being counterfeit is something extremely unnecessary since cryptocurrencies like bitcoins are already protected from such circumstances. Fake bitcoins?? Is there something like that?? A wallet would not actually accepting fake bitcoins in the first place. The whole thing is dependent on exchanging, sending and receiving, therefore at the end of the day you would not be able to copy the whole system code by code, it would fail terribly. It's not paper money which can be mistaken due to personal errors, it's not something so simple, it's honestly a simplified complex network which can't host fake nodes. ( Ever accidentally sent eth to a BTC address?? Something similar, wallet would not accept, it's not the same thing.  )