It is a good wallet with a great UI. No doubt about it. But if you are going to store a large amount of BTC for long term then I wouldn't suggest it. Since Exodus is closed source there is no way to ensure if some malicious software is injected in the code. The chances might be slim. But why take the risk? Secondly, exposing your private keys in an everyday desktop environment is not a good idea.

If you want to be safe then I would go for a hardware wallet or paper wallet. Move majority of your coins in there and leave a few coins for spending on exodus or any other mobile wallet.