Sources: crypto exchange Backpack, built by ex-FTX and Alameda leaders, is in talks to raise $50M at a $1B pre-money valuation, reports $100M+ in annual revenue (Ryan Lawler/Axios)

Ryan Lawler / Axios: Sources: crypto exchange Backpack, built by ex-FTX and Alameda leaders, is in talks to raise $50M at a $1B pre-money valuation, reports $100M+ in annual revenue   —  Backpack Exchange, a centralized crypto trading firm built by former FTX and Alameda leaders, is negotiating terms for new financing …