Both fetched sources — CoinDesk's 'Bitcoin ETFs post first monthly inflows since October as price stabilizes' and Yahoo Finance's 'Bitcoin ETFs Snap Four-Month Outflow Streak With $1.32B in Inflows' — independently state that U.S. spot Bitcoin ETFs recorded about $1.32 billion in March inflows. This directly supports the numeric core of the claim. The phrase 'bought $1.32 billion of Bitcoin' is an interpretation of ETF net inflows rather than the exact reported wording, but for spot Bitcoin ETFs the inflow figure is broadly consistent with increased BTC accumulation exposure. The added interpretation about 'continued institutional participation during a market pullback' is also supported in tone by Yahoo Finance and by CoinDesk's note that this ended a prior outflow streak while prices had been under pressure.