Cold storage will help you preserve the property absolutely. I bought one and it worked very well. Ledge Nano S is the most reliable cold storage, you should go to the official store to buy them.
Because there are some shops that are scam, they sell your Ledge Nano S but they can hack your money. That is the only risk you need to avoid. The security of the Ledge Nano S is great, we do not have to discuss.