Ethereum founder Vitalik Buterin made his first direct comments on FTX's spectacular collapse late Friday, accusing former FTX CEO Sam Bankman-Fried of "virtue signaling."

"MtGox 'looked' sketchy and never tried too hard to whitewash itself. Luna too," Buterin tweeted. Mt Gox, a Tokyo-based exchange, failed in 2014, after hundreds of thousands of bitcoin were stolen from its wallet. Luna's collapse earlier this year brought down the Terra ecosystem. 

"FTX was the opposite and did full-on compliance virtue signaling (not the same thing as compliance)," Buterin tweeted. "The second kind of fraud cuts deeper than the first."