I will always prefer to use an open source wallet, having this kind of wallet does not require trusted third party which make have no full control over your money. I always discourage people to store funds in an exchange specially when it is a large amount. Storing it in an exchange lossing you the ability to verify the safety of your funds since you rely on somebody else. This is why open source wallet is important. Multi wallet like jaxx, exodus, trustwallet are all closed source this only mean that your funds are not secure like what you think. There were open source available out there but this wallet could not hold multiple coins. Surprisingly, there is an open source multiwallet available, Its the HODLER wallet that could store coins such as BTC, ETH, LTC, BCH etch. and even ERC20 token. This wallet is the only open source multi wallet available which could verify the security of your funds and have it simply at one app.