With Bitcoin trading just below all-time highs, there is fresh attention on the world's first and largest cryptocurrency. Investors concerned about the future of the dollar may also be inclined to turn to crypto, though the space remains highly speculative. If the risk of investing directly in Bitcoin or another major token is too high, an alternative is a cryptocurrency-focused exchange-traded fund (ETF). The most straightforward crypto funds are spot ETFs like the Fidelity Wise Origin Bitcoin Fund NYSEARC ...