Are coins lost after the death of their owner?

Recently, the news about the death of the owner of the Quadriga CX exchange, which resulted in the loss of access to 26,488 BTC, 1 billion XRP, 200,000 LTC, 428,000 ETH, has been published online. This information raises the question: how many digital currency accounts can be lost because people die and do not leave private keys? There are several bitcoin wallets that were created in the very first days of bitcoin, hold a huge amount of coins, and have never moved. Such cryptocurrency is considered to be lost forever, because these accounts have no transaction history. Also, we will never know whether the owners of the “digital gold” are alive or simply did not back up their private keys before updating their PCs. According to statistics, experts estimate the total number of lost bitcoins at 3.7 million coins. What happens to the rest of the coins? Matthew Mellon, a well-known cryptocurrency billionaire, died suddenly with a record-breaking $500 million worth of XRP coins in his wallet. He did not have time to open access to the private key, which caused the loss of all his accumulated cryptocurrency savings. Therefore, the death of the billionaire means the loss of 833,333,333 XRP coins, which will definitely have a direct impact on the total supply of the cryptocurrency. We have cited only 2 cases of deaths of “digital gold” owners, and they have a great impact on the supply of tokens. How many such cases can there be? Based on official data, more than 10 thousand people die every year who do not leave their private keys for various reasons.