Since Bitcoin is running on the decentralized blockchain, transactions are transparent and anonymous. Due to its transparency, it can be traced. We can see the activities of these wallets on the blockchain.
Like what happened in the recent Binance hack, wallets can be traced where these hackers are splitting them into multiple wallet addresses. And since it’s anonymous, it’s hard for us to know the owner of those wallets (unless they revealed themselves).
Some of the Bitcoin holders who didn’t reveal themselves misplaced their private keys, lost their Ledger Nano S or Trezor, hard drive, or may have died due to accident or critical illness, which may contribute to the increased demand of Bitcoin in many years to come.
Agree. In part, Bitcoin's pseudonymous nature allows us to keep track of our coins even if identities related to each person are not exposed within the Blockchain. I believe that Satoshi designed Bitcoin to be this way, to benefit everyone using it. The situation would've been worse if Bitcoin were a fully-private cryptocurrency. Even now with the inception of mixers/tumblers, and privacy protocols, it's becoming harder for us to keep track of our hard earned coins.
Hackers could easily use these tools in order to obfuscate the destination of stolen coins. Despite this, transactions are not fully hidden from the public, which opens the path for analytic tools to analyze Bitcoin's transparent Blockchain in a more efficient manner.
Still though, lost/stolen coins can be prevented by taking your due diligence of protecting your private key at all costs. There are various ways to do this, which has been previously explained on this forum. If you manage to follow the steps correctly, you'll be able to maintain your Bitcoin for years to come. Even so, many people seem to be losing their coins due to undesired situations in life. Which means, that the more Bitcoins are lost, the better for the price of the cryptocurrency over the long term as it becomes highly rare.
Nonetheless, being able to trace lost/stolen Bitcoin is good. But, governments can use that for their advantage in order to keep an eye over people's transactions. Which is why, tracking or tracing Bitcoin is a double-edged sword. Just my opinion