I currently have 6 months' salary in Premium Bonds that I'm topping up with bonuses, birthday money and any dribs and drabs that come in. My aim is to get it to full holdings.
It gives me comfort to have relatively liquid cash that I can use in the event that I need to suddenly start over.
Sometimes I am so cross/fed up with DP that I daydream about buying a little flat somewhere by myself and decorating it exactly as I want and working on creative projects every other weekend while he has DS.
This feeling normally subsides pretty quickly but I like having the "option" there as a reality that I wouldn't have if I'd put that money into our mortgage.
To be clear, this is separate from savings/investments etc and is earmarked for this specific purpose.
YABU - I do not have a FOF
YANBU - I have a FOF