The evidence from the most authoritative sources strongly supports the statement. The primary source, a BlackRock earnings call transcript from Morningstar, provides quantitative proof of rapid growth, noting that their digital asset products raised $17 billion in a single quarter. This is a direct measure of rapid growth discussed in an official capacity by the company led by Larry Fink. This is corroborated by a news report from AOL, which quotes the company on its digital asset products growing to over $100 billion, calling them the 'fastest-growing ETFs'. Furthermore, a crypto-focused news outlet explicitly reports that 'BlackRock's Larry Fink Predicts Rapid Growth for Crypto,' directly aligning with the user's query. While some lower-authority sources are irrelevant or tangential, no provided source contradicts the claim. The consistency across multiple high and medium-authority sources makes the statement highly credible.