David Wheeler: The mainstream narrative that crypto is up against in 2023 will be a headwind. He says the ridicule for SBF and Doug Kwan and Moshinsky is totally deserved. But to me, this is a massive buying opportunity if you believe cryptos aren't a scam, he says.Wheeler: This is a great signal of how when you are being a contrarian investor about something that you know, you have high confidence in being right about.