Gary GenslerAndrew Harrer | Bloomberg | Getty ImagesGary Gensler, President Joe Biden's pick to lead the Securities and Exchange Commission, said he would hope to oversee cryptocurrency regulation, the "gamification" of equity trading and board diversity if confirmed to lead Wall Street's chief regulator.Gensler, who testified before the Senate Banking Committee on Tuesday, was grilled on whether he would scrutinize payment for order flow and game-like tactics used by some online brokerages use to help attract customers to their platforms.Both subjects have received attention on Capitol Hill over the past two months after January's wild trading in GameStop, AMC Entertainment and other stocks.Senators including Massachusetts Democrat Elizabeth Warren asked Gensler in the virtual hearing for...