Hello,
Welcome in Bitcoin community
Trezor is a solution but its expensive solution, you can also download software wallet like electrum/multibit/bitcoin core (slower than previous two) and safely store your bitcoin on your computer.
You can create paper wallet, that didn't touched internet ever. Its most secure to online theft, but is not secure to physical theft.
Choose whatever you will choose, but don't store your bitcoin on online wallets/exchanges EVER.
Welcome in Bitcoin community
They are currently stored in my wallet with Bitpanda but are they secure there? Should they be moved to something like a Tezor device[...]
They are not secure there. Move it asap. Your bitcoins are secure only when YOU control them not some online wallet, exchange etc.Trezor is a solution but its expensive solution, you can also download software wallet like electrum/multibit/bitcoin core (slower than previous two) and safely store your bitcoin on your computer.
You can create paper wallet, that didn't touched internet ever. Its most secure to online theft, but is not secure to physical theft.
Choose whatever you will choose, but don't store your bitcoin on online wallets/exchanges EVER.