I have wondered for long, if there is anyway to recover my private keys when they get lost or when I don't remember them. Someone advised me to use Gmail and store them as mails then I taught again, what if my Gmail gets hacked. Is this actually the best way to store them or is there any other ways I can store or Keep them safe?
Storing your private key online is not advisable and considered a risky method because of the possibility that your gmail might get compromised or hacked. You can refer to this article [1] to know how to keep your private key safe.
It is advised to buy hardware wallets such as ledger and alike to keep your Bitcoin and private key safe. Others advise creating a paper wallet and placing it in a place that is fire and waterproof. Some of the members here even advise engraving your private key to a metallic object since it doesn't fade like the ink of a paper wallet.
[1]
https://www.investopedia.com/news/bitcoin-safe-storage-cold-wallet/#:~:text=Users%20can%20lose%20bitcoin%20and,still%20convenient%20for%20some%20users.