Harware Wallet is safe for storing lots of assets. now there are wallet hardware like trezzor and nano ledger. so I think the hardware wallet can minimize the risk of hacker crime
You better get a Ledger!
A few days ago a guide was published on how to extract a seed from a Trezor Harware Wallet. The whole procedure takes less than 5 minutes.
You can read the complete article here:
https://ledger-donjon.github.io/Unfixable-Key-Extraction-Attack-on-Trezor/