You run a threat from co-mingling completely different actions. Your different actions pose a threat to your Bitcoin, and your Bitcoin node poses a theoretical threat to these different actions. The much less actions on a single laptop, the much less likelihood that a kind of actions will lead to a safety breach.
For instance, if you’re searching reddit on that laptop and click on a hyperlink which exploits your browser and offers a third-party entry to your laptop, they can even have entry to your Bitcoin pockets. That is not doable if the one factor on that laptop is the Bitcoin pockets and also you by no means use it for net searching.
The danger goes the opposite manner too. If there’s a safety vulnerability in Bitcoin core that permits entry to your machine, your use of Bitcoin may imply any person will get entry to your browser historical past. This has by no means occurred earlier than, I might say it is a lot a lot much less doubtless, particularly you probably have not setup port forwarding and due to this fact are solely related to a handful of nodes usually, but it surely’s not not possible.
Finally you’ll have to determine how a lot safety you need and what value that safety is value. If you’re simply taking part in round with small quantities of funds, you most likely need not fear. However as you enhance the quantity of funds you might be storing, you’ll most likely need extra safety and be keen to do extra to have that safety. Having extra Bitcoin in your node does not do you any good (except you will have it locked up in a lightning liquidity channel or are usually spending a lot of that stability). As a substitute, mulit-sig, chilly storage, and different options most likely make extra sense.