It's a good thing to do, paying your bride price with Bitcoin, but know this that you will have to consider some things in mind before starting, know if the parents (your in-law) will appreciate and accept bitcoin from you or not, you can have an idea of that from your wife to be, also know that if you pay them the bride price in bitcoin, the money has left your reach and possession to their own end, now the question is whether if they are going to hold the bitcoin given as bride price or spend it as they receive it, you will have to agree with me that each family has their own local customs and traditions when it comes to how they deal with bride price money, so it will not be a challenge if they are accepting for bitcoin in the first place to be used as bride price.