sorry, I should have been more precise: By "pensioners" I meant "older people look to preserve their wealth in the later part of their life so they dont run out of money before they die". That's a pretty huge pot of value that's currently monetising other assets.

I don't think today's old people will save the large part of their wealth in bitcoin, they'll chose other assets. BTC feels too volatile, unknown and unsafe to them. As bitcoin will be a larger and larger part of successive generations' financial life, you'd expect bitcoin saving amongst old people to trend upwards over time though.

It may be that the first gen to save in BTC as old people will have to be "bitcoin native" generation (i.e. born into a world where bitcoin is normal). 

 I think this makes a lot of sense. I also think there needs to be a global technical standard for inheriting bitcoin. A lot of bitcoin will be lost before there is such a standard.