The launch of spot bitcoin exchange-traded funds is ironic given that it goes against Satoshi Nakamoto's decentralization mission, Securities and Exchange Commission Chair Gary Gensler said in an interview with CNBC on Friday morning. 

Nakamoto, the pseudonymous, still unknown creator of the cryptocurrency who wrote the infamous bitcoin whitepaper, proposed a "system for electronic transactions without relying on trust," in 2008. 

"There's an irony in the midst of this — Satoshi Nakamoto said this was going to be a decentralized system and finance — this has led to centralization," Gensler said on CNBC. 

Gensler's comments come days after his agency approved a series of spot bitcoin ETFs, though the chair quickly pointed out that it did not mean the SEC approves or …