Yup I hear ya. I was thinking about the same periods. 3 ys is the lifecycle I am working for mining HW to be shifted from the operation.

What I worry the most is margin call, at 90% you will get into the force liquidation phase. So... if you take a 50% LTV you have barely a 40% wiggle room. We had weekly falls May 2021: -53%, March 2020: -50%, December 2017-December 2018: -84%, December 2013: -50%, April 2013: -83%, August 2012: -56%, June 2011: -99%,....

So my concern is I will be risking a margin call at 90% whenever MMs decide to dick retailers while playing SQL Liquidations on fractional exchanges... until more healthy volatility is achieved,... don't know if this could be an option if you plan to be away for more than a week or you have perfectly scripted your way into responding the margin call.