http://forums.babypips.com/forextown/117-how-do-taxes-work-forex-trading.html
According to the article, if you trade cash forex as a speculator, the following rules apply:
Interesting. This position assumes bitcoin is a currency, or foreign exchange. On the other hand, if bitcoin is a commodity, I think the capital gains/losses approach I outlined in my previous post applies (this is, I believe, the type of reporting required of individuals trading precious metals, for example -- see http://www.irs.gov/publications/p17/ch14.html ).
But with respect to a "sort of currency that acts like a commodity but we'd like it to be a currency but it's not quite yet" you know, I'd go with considering it a currency.
If one took a position that resulted in paying higher taxes, and a clear determination was later made by the IRS which resulted in lower taxes due, then one could file an amended return.
A much more difficult and interesting question is something like whether it's time to get out of IRA and 401k plans entirely, and what the tax consequences for those types of actions are.
This is a great common sense approach to taxation. And the IRS will look upon you kindly and will more likely than not deal with you in a "fair" manner if you take Spendulus approach. Making the effort to pay your taxes on your bitcoin gains, even though there are no regulations pertaining to it, shows a willingness to abide by current tax rules. And if you have the wrong tax treatment, whenever they do get around to enacting specific regulations to govern digital currencies, you can always amend your return. If you erred on the conservative side, then you are in line to receive some extra money back.
To answer your question regarding cashing out retirement accounts, if you are under 55 for a 401K and 59.5 for a IRA and you withdraw your retirement savings without an exempted reason, then you are subject to a penalty and a tax. The penalty is 10% of the withdrawn amount. The tax is your regular income tax rate. Whatever amount you withdraw will be added to your income, subtract your deductions, exemptions, and credits, then calculate the tax.
Some people make the decision to cash out early because the gains in their retirement plans have been in excess of 10% and the income tax on the withdrawal is minimal due to low taxable income. If you are planning on using the withdrawn retirement funds for a specific reason, buying a house, paying medical bills, you might be exempt from the penalty. If you want to use the funds to invest in a business, you will be able to maintain your funds in a retirement account and still invest in a business. There are many options to access your retirement savings.
Speak with a professional to explore all your options and to find the best tax advantage option for your personal financial situation.
The above is not advice. It is free information. You must pay for professional advice from a trusted source who is professionally licensed.