Most likely not a great concept. Because 1 from the primary benefits of an annuity is the fact that your cash grows tax-deferred, it tends to make small sense to hold 1 in an account like an IRA, that is currently tax-deferred. It is a small like wearing a raincoat indoors.
There are some exceptions. If you are retired or extremely close to retiring and also you really feel you'll need much more assured earnings than social safety will offer, it could make sense to make use of a portion of one's 401(k) or IRA cash to purchase an instant annuity which will spend earnings for life.