I believe the answer is: all of the above,
A.) keep your money in a safe place
Preferably a trusted banks since the money put in that place is insured by the government.
B.) protect your personal information
In order to prevent identity theft that can cost you a lot of money.
C.) become educated and informed
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This would provide you with knowledge regarding the type of investments that is suitable for you and the type of precautions that you need to take to prevent a loss.
E.) have an emergency fund
this would help you stay afloat in case there is unwanted circumstances that
prevent you from getting your usual income.
F.) purchase warranties
In order to ensure that you can get your money back in case the product that you bought i broken.
G.) know your consumer rights
So you can take legal moves in case the company is knowingly do something that harm the customers.