Robinhood did successfully complete its IPO on July 29, 2021, but the valuation was far below the predicted $50–70 billion range.

Multiple contemporaneous reports show that Robinhood priced its IPO at $38 per share, giving it an initial valuation of about $32 billion based on its basic share count.

• CNBC: IPO priced at $38 per share, valuing Robinhood at about $32 billion. (cnbc.com)
• Nasdaq/CoinDesk: IPO priced at $38 per share, implying a valuation around $32 billion. (nasdaq.com)

Analyses that consider a fully diluted share count put the valuation somewhat higher, roughly $36–40 billion, but still well below $50 billion. (techcrunch.com)

Since the prediction was specifically that Robinhood would IPO at “like a 50, 60, $70 billion valuation,” and the actual IPO valuation was in the low-30s billions (or high-30s billions on a fully diluted basis), the predicted valuation range did not come true.