Dual booting is not bad!

What I do is share an NTFS partition between Windows and Linux for bulk data. If they’re DRM free, you can literally run the same games off the same drive.

Something goes wrong? I can just delete the windows partition and start over in 30 minutes, without losing hardly anything. It’s so much better as a “disposable” OS.

I also use two EFI partitions (the default Windows one and a new one for Linux) so there is zero possiblity of the OSes interacting.

To be blunt, I would never do banking in Windows if you can do linux. It’s just too much of a risk.