Coins should always be considered in a safe storage, there are lot of wallets and platform that could be used to hold coins, both of this has good side and bad. Where will you choose to store or hold your coins, in a close source wallet (exchanges) or an open source wallet like electrum and Hodler wallet?
Our first priority when we are holding our coins is the safety and security of it. Hackers can stole our coins if we do not store our cryptos in a safe storage. I always prefer to store my coins in offline wallets for me to ensure that I am the only one who has access to my wallet.