Shouldn't the FDIC change its regulation of protecting an investor only up to $100,000.00?

NO IT WOULD BE TO COSTLY.
several years ago there were a number of banks that went under and i think they had to pay out over 100,000,000 billion dollars.
JUST PUT SOME OF YOUR MONEY IN OTHER BANKS.
INVEST IN BANK C.D.'S
THEY ARE FEDERALLY INSURED UP TO $100,000 FOR EACH BANK YOU DEAL WITH.
CHECK OUT MONEYRATE.COM FOR THE HIGHEST C.D. RATES IN THE COUNTRY. MOST NOW ARE PAYING ABOUT 5% OR A LITTLE BETTER LIKE 5 1/2%
MUCH HIGHER THAN ANY SAVINGS ACCOUNTS BUT YOU TIE UP YOUR MONEY FOR A PERIOD OF TIME DETERMINED BY YOU.
IF YOU WANT A GOOD RATE THAT IS A SAVINGS ACCOUNT THAT PAYS THE HIGHEST RATES IN THE COUNTRY, THHAT I KNOW OF. SEARCH OUT ING BANK
YOU KNOW THE ONE THAT SHOWS YOU THE ORANGE BALL. I'VE BEEN WITH THEM FOR ABOUT 5 YEARS.
ONCE AGAIN FEDERALY INSURED UP TO $100,000
GOOD LUCK AND I HOPE YOU CHOOSE ONE OR BATH OF THESE WAYS TO DIVERT SOME OF THAT MONEY.

I would argue no, the majority of people and accounts out in circulation are going to contain ammounts far less than the $100,000 benchmark. Typically if you've got $100k or more you're going to have it spread out across several avenues of wealth generation (stocks, bonds, mutual funds, cd's, etc).

Actually the FDIC doesn't protect investors. It only protects bank depositors.

There are ways to get around this. If you have more than $100,000 in the bank split it between more than one bank. You are protected for upto $100,000 at each bank.

Like Shoredude said, FDIC does NOT protect investments. It protects bank accounts. When you make an investment, you are taking a risk. If your investment plummets in value, then you lose that money.

If you have large sums of money that you aren't investing, you can have multiple bank accounts of up to $100K each to protect your money.

There is no reason to.

If you have more than $100k you can simply buy Treasury Bills which are actually a tiny bit safer than an insured bank account.