The secret of the 19 bitcoin and the last wallet

It's a real treasure hunt and it worth one billion of Higgs coins, this is exactly what my grandfather told me too.
How many parts of the privet kye do you have John said.
Immediately Richard respond to Johns question while he's trying to remember; Well on 2018 my grandfather gave to my dad one part of from three parts of a wallet privet key, and he said he is positive that they are correct.
It's the year of 2145 and one bitcoin worth almost one billion higgs coin.
Higgs today is the global currency and everyone use higgs coins. On 2145, despite that bitcoin worth this huge amount, there is no transactions going on in the exchange market because people who are behind the New World order have bought all available bitcoin since 2040. Physically there is no available BTCs in the market except these wallets Who left behind because of the death of their owners.
And these wallets private keys kept secret in the graves of their owners.
John and Richard are friends since childhood and they know all about the history of bitcoin, since they worked with their fathers mining bitcoin and other cryptocurrencies. it's a family heritage as their grandfathers worked also in mining.

Before my grandfather passed away he gave passed my father one part of the privet key for the secret wallet.
This wallet belongs to Mr. Peter my grandfather friend.
He was one of the pioneers in mining since 2008. At 2020 Big volumes of BTC was purchased from the market gradually, despite its price was going rapidly crazy but still these big volumes, transactions were taking place and prises went like hell. Because of the high price of BTC everyone was rushing to sell their BTC. However BTC was controlled by anonymous group of people.
Mr. Peter was one of the few people who did not sell some of his BTC.
Back at 2041 one day mr. Peter showed my grandfather the private key for 19 BTC in wallet and said we have to memorize this private key I'm afraid that this will be the last wallet. Mr. Peter and my grandfather and your grandfather divided the private key into three parts everyone of them memorize a part.
John blinked with his eyes and said; then my grandfather knows the last part of the private key, what about Mr. Peter part John said?

I'm not good in writing stories or novels but this is my imagination about the future with BTC. I was asking myself what will happen with these bitcoin wallets that will be buried with their owners if no one know the private key. What is the fate of these bitcoins, and is there a way that we can inherit our wallets for future generations.

If you like the story based on your upvotes and your request by adding a comment, I will complete the rest of the story