Govt plz
This regulation could be positive. The thing stopping btc from going mainstream and the hedgefunds and banks getting involved is the possibility of btc getting totally regulated/killed - a little regulation would do btc a world of good imo (for price speculators that is).
I somewhat agree. If the US government only "regulates" bitcoin, then it would mean they are not interested in killing the currency completely. That would actually be good news for mainstream merchants who are scared of bitcoins. It would give assurance that the "world's police" isn't looking to arrest bitcoin. I'm not worried that bitcoin would be killed by this US regulation. In fact, I think the price would soar and there would be acceptance with merchants and consumers. The US isn't the only one using bitcoins.
When the USA regulates it, I'm pretty sure that people would rather use other fiat currencies to buy bitcoins and so in the end, the US would be at a disadvantage and hopefully, the US regulators would realize that in the future. People would dump the dollar and probably use Yuan to buy btc instead.
At this point, I think that the bitcoin market cap is too small for governments to hesitate in banning it. There'll absolutely be no economic impact YET. Although I am very skeptical that governments could stop cryptocurrencies, that $5 bn dollar market cap of bitcoin is nothing to them. I'd rather have the regulation than have them outrightly fight against bitcoins. However, I believe the government realizes that cryptocurrencies would not go away even if they kill bitcoins so I do think that all they can do is to slightly "regulate" it.