More and more I am thinking that the answer to this question is going to be never. Apart from the fact that I obviously wouldn't have CGT to worry about, once the price gets to a certain level, I can just use it as collateral to finance me for the rest of my life. It's almost certainly going to keep accumulating, if slower eventually, due to government monetary operations. Got the idea from Saylor, but just thinking through the calculations makes me think it is worth it to get the steady income stream rather than the one big hit and then having to worry about getting a yield in Aussie dollars. I'm not giving up my percentage of that 21 million.