Keep in mind that my own ideas regarding withdrawal or sustainable withdrawal, whether based on price or based on time, presume that the person had reached a status of over-accumulation.. or alternatively using a set budget, for example giving a 10 Bitcoin budget to a business, then if the business were to be using a time-based withdrawal system, then the business could figure out its withdrawal rate, and so for example the tool currently asserts that a 4% annual withdrawal rate would be 0.03333333 BTC per month, even though surely I want to adjust the tool so that it would use the 200-WMA dollar value, yet we have not yet made such adjustment, and then perhaps be able to withdraw up to 10% based on that way of valuating the BTC holdings, yet we have not yet made those adjustments... so until we make such changes, it may well be better to stick with more conservative withdrawal rates of around 4-6% annualized.