That's quite a large amount, and a sad truth is that it will persist as long as there are holders who pass away while holding Bitcoin.  I believe this data should increase year by year, as those coins are lost due to forgotten wallets or lost private keys, making recovery practically impossible.

Do you want to know how much I own right now in my wallet?  It's $5.
I'm not in a rush to own BTC.
Life goes on regardless, and I’d prefer to avoid the stress of buying at a high price only to see it drop during a market correction.  Patience feels better than rushing into a potentially overpriced purchase, and honestly, I’m not really concerned about the numbers, it's just an assumption.