Should Binance users be worried over the exchange? Just opinion when you put money on centralized exchange then you should worried about it, especially in this case binance has struggled to fight with the SEC and CZ to step down from the CEO position.
Tho Binance is such a big exchange and what happened to binance might sake the world of cryptocurrency. according to coingecko and coinmarketcap the binance still at the top of number one exchange in the world
As an exchange which is centralised, fine, one can be worried as your coin is not controlled by you since the company can do and undo with your money. Other than that, you have nothing to be worried about unless for the insolvency of the company, that's if it is stressed, but it is not.
What you believe should cause worry in Binance can actually cause it because this is not the first time that a company will have issues with government agencies and get fined, and even their top officials go to jail. Binance is a multibillion-dollar company and so is the CZ who founded it. Their worth is far bigger than the fine of the SEC, so there is no issue here. The company continues to operate fine just like the other companies that were fined before it.
Even the biggest banks in the world often have their fair share in regulatory fines, so it is no big deal. Also, as you can see now, the operation of Binance continues as if nothing happened, this is even as the BNB which could be argued to be the company's stock is up again.