I am not going to say I know the “value” of bitcoin.
Buffett does not understand the abstract notions involved with the coding of the blockchain and the mining process. He does not understand NFT on the Eth blockchain.
He could understand if someone in his sphere wanted to explain it. He is remarkable for 91.
There are hundreds of billions of dollars of pent up buying power in Bitcoin and Ethereum. That is the foremost value of it. The coding makes it scarcer than the USD.