I understand that you said that you created this address and its private key using Bitaddress a long time ago, but there are very few valid reasons to use such addresses in 2025. At one point in time, it was discovered that Bitaddress.org had issues with the randomness of its entropy, making the private key it generated not safe enough as it should be.

Also, why bother with individual private keys nowadays when we have seeds and seed words that are much easier for humans to write down?! 12 or 24 English words make more sense than a long string of numbers and letters (the private key) in a format that doesn't make sense to our eyes. It's more difficult to make physical backups of private keys and a greater chance that you will make a mistake.