A. If you have accumulated a few millions in your IRA account, then start withdrawing funds from it in small amounts each year right now, even you don't need the money, makes tax sense.
Because otherwise once you reach 70.5, you will be forced to take the "required minimum distribution (RMD)" of a certain percentage of your IRA, with a multi-million dollar IRA account, you will likely be pushed to a higher tax bracket, while you might be in a relatively low tax bracket in your early 60's.
If you don't really need the early withdrawn money, you can put it into Roth IRA (if you quality), it will be there tax free, with no RMD requirement.
In the meantime, you should defer your Social Security benefits payment as late as possible, because such delay will lead to higher Social Security payment down the road.