The big four banks are all extremely entrenched, competitively advantaged businesses. They will be around for a long, long time.
The pace of growth experienced since the turn of the century has been phenomenal, driven by a surging housing market, benign economic conditions, increasing household income (due also to the increase in dual income families), falling interest rates and vertical expansion (eg into Welath management).
My view is that these drivers will seriously slow in the coming decade.
It's also worth remembering that banking is typically very cyclical -- something that is easy to forget in Australia given we haventy had a recession in more than a quarter of a century!
Plus, we don't yet know the outcome from the Royal Commission. It could act to limit profitability via a number of regulatory requirements
So for me, I'm only interested at a low enough price. (See my forecast page)