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It has been a banner year for spot bitcoin exchange-traded funds, with some of the biggest asset managers introducing ETFs that hold the flagship digital currency. But there are things to consider before adding these ETFs to your portfolio, experts say. The U.S. Securities and Exchange Commission approved the first spot bitcoin ETFs in January. Earlier this month, the 12 spot bitcoin ETFs collectively surpassed $100 billion in assets under management, marking one of the most successful ETF launches in history. Bitcoin ETFs give investors a