Apple is the largest stock in existence, and it is also a "Big Five" tech company. It has not demonstrated any significant interest in cryptocurrency, but there is some hope for the future.

Retail services: Apple Pay does not support cryptocurrency transactions. In 2014, Apple applied for a "virtualized currency" patent. This was not integrated and would not have used cryptocurrency; nevertheless, digital currencies of any sort are arguably a step toward support for cryptocurrency.

Enterprise blockchain: Apple patented a blockchain-based timestamp tool for data management related to iPhone security circa 2018; however, it is not clear if it is actively using the technology described in the patent.

Anti-crypto activity: Apple has banned third-party wallets and mining apps from its stores, a policy that is similar to that of the Google Play store. Additionally, Apple appears to have a list of approved cryptocurrencies that third-party wallets are allowed to handle.

Investments: Apple has not invested in Bitcoin or crypto investment vehicles, nor has it invested in any blockchain firms.

Executive sentiment: Apple co-founder Steve Wozniak is a notable fan of Bitcoin, calling it "pure digital gold… and I totally buy into that." He has even launched a blockchain-based energy management blockchain company called Efforce. However, Wozniak is minimally involved in Apple today.

Jennifer Bailey, VP of Apple Pay, has stated that Apple is monitoring Bitcoin. Meanwhile, CEO Tim Cook has disavowed the idea that Apple could launch its own cryptocurrency, but that does not rule out Bitcoin support.

Summary: Apple is not very interested in cryptocurrency. However, it is conceivable that it will eventually add retail support for Bitcoin or use blockchain internally, given that it is at least aware of crypto.