We can observe only a portion of the entire universe. Because the universe is only about 14 billion years old, light has only had about 14 billion years to travel through it. Therefore, the most distant regions of the universe we can see are about 14 billion light-years away. This is the extent of the observable universe, but the entire universe is probably much larger.
According to the Internal Revenue Service, any interest you receive, or that is credited to an account and is available for withdrawal, is taxable in the year you receive it. This money is included in your annual income when you file your taxes, making the tax rate on interest equal to your normal income tax rate.
You can, however, get more insurance if you are willing to have it go to others when you pass on, but more on that later. The FDIC does consider an IRA a separate depositor and insured separately. Thus, one individual can stash $250,000 in a taxable account and another $250k in an IRA account. Be careful though, Roth IRAs and Traditional IRAs are not considered separately insured from each other. One couple - $2,000,000. Here, each spouse can put away $250K in a taxable account and an IRA, accounting for the first million, as well as an additional $500K with a joint account.