well i think the best and secure way to store your bitcoin is to make an two duplicate wallet account. One is for your official transaction and one for your backup and storage. Of course, you need to have a unique bitcoin wallet address to make transactions. You can use Ledger nano wallet and Try also to diverse your bitcoins from different hardware you have. Criminal are being smarter and smarter and you might be the next victim and always be aware on what you've browse online.