IPLD is literally a merkle tree data structure format standardised by IPFS which is heavily rooted in cryptocurrency and in fact has its own cryptocurrency created by the IPFS devs: Filecoin.

DIDs were created by cryptocurrency orgs. The standard was created by a bunch of cryptocurrency groups working with the W3C and the entire time it was being developed, it was derided by non-cryptocurrency people as just another way for cryptocurrency to scam people. It doesn't stop being related to cryptocurrency once you realise it's useful.