For one thing, you need actual earned wage income to open a Roth. Social Security or dividend payments don't qualify.
Secondly, unless you intend to leave the Roth to your heirs, it's likely you wouldn't earn enough off compounding for it to be worthwhile. Usually it's a minimum 15-20 yrs compounding needed to offset the taxable investment in a Roth.
Now, if you are talking a CONVERSION of your IRA to a Roth, that's different. This is the year to do it, for it's the only year you're allowed to split your tax bill payment over two years. If you have an IRA you want to leave to your heirs, and can pay the tax bill, conversion to a Roth is an excellent idea.
Do not do anything, however, without consulting a good tax advisor! Good luck.
Proportionate conversions are required IF you have ever made after-tax contributions to ANY of your IRAs. The IRS does not allow you to differentiate the funds involved, in such case. If all your funds are pre-tax, then you can convert part or all of any account.
A full explanation can be found at: http://www.bankrate.com/finance/retirement/7-steps-to-a-2010-roth-ira-conversion-1.aspx. It's possibly the most complete article I've seen yet on this complex subject. HTH.
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