you should check your old exchange accounts and crypto wallets is a smart way to find valuable coins or tokens that you forgot or didn't recognize before. It is possible that if the projects are successful then the coin can have a significant value after a while. But caution is also required when interacting with token contracts on the block explorer. It is important to check the legitimacy and safety of the token to ensure that you are not exposed to risks or scams. Through reviewing, researching, and using trusted websites or services, you can check and evaluate the integrity of the token before interacting with it.
And if there are more than a hundred such wallets or accounts? It will take a lot of time to check all wallets. During this period, the price of tokens may drop significantly. There is a kind of lottery. Either I found out that some token had grown in price or accidentally found it in a nightmare. It is not smart to specifically monitor many accounts.