I think it's considerably less than 4% if we only take into account bitcoin ownership through personal keys. Not through a bitcoin ETF or any other vehicle for exposure to bitcoin. I've looked at the tweet, but it doesn't clarify anything else. I suppose it's a statistic, which, like all statistics, has a margin of error, but this aspect is not clarified.
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I think we have to consider individuals holding Bitcoin through personal keys, the percentage of global ownership might indeed be lower than 4%. This method requires technical knowledge and involves managing one's own wallet.
Estimating the exact percentage of global Bitcoin ownership is challenging due to the decentralized nature of the cryptocurrency. However, Don Pedro Dinero's point about personal key ownership is crucial.
And still on th other hand, Bitcoin ETFs and other investment vehicles have made it easier for people to gain exposure to Bitcoin without directly holding the cryptocurrency. This has led to increased institutional investment and adoption.