I am new one in this market place, so it is important to know the safety issues of the wallet. Please someone help to understand the issues of safety of the market.
Keep it on an external wallet like nano ledger. If you are using erc20 wallet do not share your PK and store a hard copy of it. Bookmark always the website you frequently used like mytherwallet.com to avoid phishing site. For market exchanges you may use google auth and email verification.