A big fight is brewing over cryptocurrencies. These are some key players to watch

From left to right: Sen. Cynthia Lummis, R-Wyoming; Securities and Exchange Commission Chairman Gary Gensler; and Sen. Elizabeth Warren, D-Mass. All three are likely to play important roles as the country starts to shape regulations for cryptocurrencies such as Bitcoin.

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Cryptocurrency is at a crossroads.

As its popularity explodes, the Biden administration is laying the groundwork to set rules for an industry that has surged in popularity, but has so far fallen into a regulatory netherworld.

That’s sparking what’s likely to be a heated debate about which agencies have the authority to regulate cryptocurrencies such as Bitcoin – and what Congress’ oversight responsibilities should be in a market that has grown to $2.5 trillion, or slightly less than the size of France’s economy.