I could not resist but to make a few adjustments to my table in order to 1) add descriptions to the spends from they accounts, 2) show the dollar amounts for each month and that way we can see how the dollar value of the account changes, 3) highlight a couple of the values related to how the BTC spot price relates to the 200-week moving average, which showed me that I had mislabelled row three and it should be BTC spot price - even though the highlighted cell is 200-week moving average.

Adding of the dollar value did really highlight that a 4% withdrawal rate is likely quite a bit too low in terms of a sustainable amount, even though it might be an acceptable withdrawal rate if the goal is to allow the account(s) to continue to grow... so if the goal would be to attempt to mostly maintain the value of the account,  most likely the withdrawal rate would need to be quite a bit higher than 4% per year, perhaps double or more.