Consider financially responsible people in their 50’s and 60’s that have had decades to save. There are plenty of “regular”, middle class people with this type of savings in their account.
If you have that much in liquid cash, you meet virtually no definition of the term "middle class". You are upper middle class at leadt and you probably have a financial advisor who is telling you that you shouldn't locate all your money in one account unless it is yielding in a way that justifies such a risk. At least I hope you do.