If you have more than high 5 figures of money lying around, should you be co-mingling it with your everyday activities?
I wouldn't feel particularly comfortable even having 5 figures of tradfi cash lying around in my house let alone carrying it on my laptop where someone could steal my bag or machine and that's before it is connected
Brand new laptop, stock Ubuntu on it, nothing else. If you don't want to go the Qubes OS way.