“What if a plumber came and fixed your sink and you paid him $40? He went into the bank and he goes, ‘I’d like to cash this check. Mr. McAfee wrote it to me and I’d like my $40, and, while you’re there, would you please tell me what his balance is, and, from now on, forever, would you please inform me every time he has an incoming wire or deposit, and every check that he writes, and to whom?’”

“That’s what bitcoin is,” McAfee said. “Would you be happy if your bank did that?” He added, “Please, you know you wouldn’t. We know, if anybody has any sense, and if you understand human nature, then privacy coins will be the winner.”

Privacy coins, also sometimes referred to as anonymous coins, are cryptocurrencies such as monero (XMR) and zcash (ZEC) that tout capabilities to hide transactions and other activities.

(from a John McAfee interview with Forbes in 2019)