Crypto is a not private. The blockchain is public.

Not necessarily true for all ledgers, such as monero.

https://www.getmonero.org/get-started/faq/#anchor-different

Monero uses three different privacy technologies: ring signatures, ring confidential transactions (RingCT), and stealth addresses. These hide the sender, amount, and receiver in the transaction, respectively. All transactions on the network are private by mandate; there is no way to accidentally send a transparent transaction. This feature is exclusive to Monero. You do not need to trust anyone else with your privacy.