Out of curiosity I looked at the private key made in hex format of the first 64 decimals of Pi
1415926535 8979323846 2643383279 5028841971 6939937510 5820974944 5923
This gives in P2PKH the address 1CBDsCzfGBNXvTqpiRZQ6EZi2DYF5VQmGU

To my surprise it had some transactions in march 2025, so a just few months ago. The related transactions are strange, for example it got its balance from bc1q5a3ak3vlmsawfptv99pvmxzv4qxvg7aj7re48g and this one has most of its transactions as payment+change to itself, which I thought is a very old way of doing transactions

Is that correct? Do you notice other curious things about these addresses?

Thanks.