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.
First of all only install trusted wallet. Make sure wallet you will get is the official wallet or trusted like for example store btc from wallet listed in bitcoin.org or eth from metamask and myetherwallet. It will be nice if you wan get your hardwallet like trezor. Then make sure you have latest antivirus/anti walmare in your computer or android/ios phone. When opening wallet write down or save in safe place where you have access and wont be forgotten your seed and private key coz once you lose them it will be impossible to open your wallet . And last but not the least never share your private key to anyone even not even for a website. Also take note to be careful in opening link from emails or chat coz that may be phishing. Goodluck and welcome to crypto world.