I can see that you are a Nigerian too so I have these few questions for you, is paying the bride price with Bitcoin acceptable? Do you think your lnlaws will buy the idea of paying with Bitcoin? In Nigeria I know that paying a bride's price is not just about the bride's family alone, there are people that are involved in the whole thing and it isn't appropriate to do this. There are many ways to achieve this your aim of being remembered, if you want to give your in-laws a part of your asset then I suggest you do it after the whole marriage is done then you can use Bitcoin to appreciate your in-laws for raising a great daughter.
if i gift my inlaws bitcoin after the marriage, how will the history be made. I am surprised why this idea sound so strange to people and it appears to them unachievable. If i send bitcoin to my inlaws, there is no law stopping them from converting it to fiat. To me, this is not a problem at all.
Of course to you it is not a problem and it is not a problem for me either, but what about your in-laws? In my place, you must present a visible currency to your in-laws as the bride price for everyone to see and even before you present this money there will be a little negotiation on the exact amount you are supposed to present before everything can be finalized. Maybe you should have a proper conversation with your in-laws first and try to educate them on the importance of Bitcoin before the D day so you don't sound like you are trying to scam them, we have different tribe in Nigeria and maybe your tribe can accept paying with Bitcoin but my tribe would never, I am Igbo and the igbos take bride price very serious. I would like to be a part of this marriage agreement just to see if it works out for you and I hope it works out for you.