For what it's worth, you can expose yourself to BTC in the futures market later this month. That's regulated to the same degree all commodity futures are regulated(which is "a lot"). Your profits(and losses) are guaranteed by the clearinghouse(not the exchange), which mitigates your exposure to another mtgox-ish/btc-e/yadoxi event.
In terms of "always on", the futures market is always on. You can trade softs, metals, currencies, bonds - you name it. The leverage available is 200:1, 50 times greater than the SEC's limit on security margins(eg the stock market). This means you can make(and lose) catastrophically larger amounts than you began with. Controlling your risk is no longer done by a broker limiting your leverage, it's done by you and involves methodical discipline.
The downside: you are trading against pros with deeper pockets and more experience than you could possibly imagine. You won't be out smarting, out trading, or getting "an edge" on anyone except the other retail players.
In terms of "always on", the futures market is always on. You can trade softs, metals, currencies, bonds - you name it. The leverage available is 200:1, 50 times greater than the SEC's limit on security margins(eg the stock market). This means you can make(and lose) catastrophically larger amounts than you began with. Controlling your risk is no longer done by a broker limiting your leverage, it's done by you and involves methodical discipline.
The downside: you are trading against pros with deeper pockets and more experience than you could possibly imagine. You won't be out smarting, out trading, or getting "an edge" on anyone except the other retail players.