Bitcoin is on the brink of blasting into the mainstream, as restaurants, coffee shops and hotels begin to accept the virtual currency, leaving lawmakers and regulators scrambling to sort out how best it can be regulated.

The price of Bitcoin soared to a record high of $750 on Mt. Gox exchange on Monday, ahead of a congressional hearing where lawmakers from the Senate Homeland Security Committee discussed slapping regulations on the relatively new currency.

Bitcoin, which is not backed by a central bank and can be traded privately or on a handful of exchanges, is known as the Internet’s black market’s currency of choice. Just last month, federal law enforcement officers shut down Silk Road–a hidden online marketplace known as the “Ebay of illicit goods” where people used Bitcoin to purchase drugs, guns, prostitutes and other illicit goods and services.

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As the digital currency gains more popularity beyond the dark corners of the Internet, regulators are beginning to acknowledge it as a credible alternative to traditional payment methods in need of some oversight. Before the hearing, Bitcoin received an unexpected nod of support from Federal Reserve Chairman Ben Bernanke, who said in a letter to the committee that it “may hold long-term promise.”

Indeed, the 12 million Bitcoins in circulation are being used to purchase everything from sandwiches at a Subway franchise in California to online dating memberships on OkCupid.com, and hotel rooms at the Howard Johnson hotel chain. Even politicians are getting in on the Bitcoin boom. Just last week the Federal Elections Commission announced that it would be taking the first steps to allow political campaigns to accept Bitcoin donations.

Although federal and state officials have already issued a handful of guidelines to monitor digital currencies, they are still working toward a unified strategy to address potential regulatory problems. Bitcoin advocates, however, caution that excessive or intrusive regulations could hamper the United States’ role in what they say is the next “technological revolution.”

Testifying before the committee, Bitcoin Foundation General Counsel Patrick Murck said, "Incautious behavior on the part of governments and law enforcement could make the Bitcoin environment harder to work with.” He added that if regulations are too intrusive, more Bitcoin users could go underground—making any regulations nearly impossible to enforce.

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All three administration officials testifying agreed with Murck that regulators must be careful not to stifle innovation.