Mike Segar/Reuters This story is available exclusively to Insider subscribers. Become an Insider and start reading now. At a forum Thursday, Robinhood's Daniel Gallagher talked payment of order flow, SPACs, and crypto. An SEC alum, Gallagher said regulators will likely scrutinize SPACs and cryptocurrencies. The SEC won't likely overhaul the trading mechanism brokers like Robinhood are built on, he said. Daniel Gallagher, Robinhood's chief legal officer and former regulator, is a "pretty free-market guy." Gallagher's skeptical...