Exodus developers themselves don't recommend using their wallet (if storing large amounts):
7.Finally, and most importantly, if you are storing large amounts of crypto assets do not use Exodus.
This says all. Even the developers do not recommend it.
The best practice is to buy a Ledger Nano or Trezor.
There you can use Electrum Wallet for bitcoin and the native software for the altcoins. This is best way to store cryptocurrency today.
Why is Electrum better than Exodus? Both wallets encrypt private keys and keep them on your device. Maybe I'm wrong, but I think that most of non-custodial wallets are the same.