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Almost everybody – all but 2% – had at least heard of bitcoin (BTC) . A wide segment of voters claimed they’re also familiar with Ethereum’s ether (ETH) , with less than half (46%) saying they’d never heard of it. About 17% of voters say they’ve invested in bitcoin, putting that asset nearly as high as those who say they have bonds, and significantly higher than those who invest in exchange-traded funds (ETFs).