They could be placed in picture frames and alert someone - a doctor or family member - if the regular pattern of movement is altered.

BBC: NEWS | Health | How gadgets will aid elderly at home

In a recent report, Strategic Insight compared this rise of blockbuster funds and a "winner takes all" pattern in cash flows with the concentration of wealth protested by the Occupy Wall Street movement.

WSJ: Which Funds Attract the Most Cash?

There is a familiar pattern in which youngsters turn to the movement for accommodation and then agree to follow a regime of fasting and prayer.

ECONOMIST: Fethullah Gulen