Advice to artists who collect

"I always thought you should never buy anything that costs more than your own works. I thought it was a good rule, but I broke it a few times, so I changed it. I brought a Bacon* and it became: never buy anything that costs more than your own work unless it is by a dead artist."
Damien Hirst
* Francis Bacon's A study for a figure at the base of a crucifixion 1943-44