Online brokerage platform Robinhood’s crypto transaction-based revenues increased 161% year-on-year to $81 million in the second quarter amid a rise in trading volume. The $21.5 billion in trading volume was a 137% increase from Q2, 2023, but a 40% fall from the Q1, 2024, the trading firm revealed in its Q2 financial statement on Aug. 7. Robinhood attributed this to a downward swing in monthly active users in Q2 as crypto prices fell. “When the crypto markets are hot there’s a huge immediate spike in monthly active user engagement metrics but then when crypto cools down that tends to drop more…