#3 - Critical Thinking - Find the best purchase date for a Bitmain S9 Rig Find the month that yields the highest return for purchasing a Bitmain S9 Rig. Consider the following two strategies: 1. BTC is mined and converted immediately to USD 2. BTC is mined and BTC Profit is held until EOY Rigs can only be acquired in the first four months of the year (Jan to April). State all of your assumptions. Days in Month Power Cost $/kWh Hashrate TH/s Power (Watts) S9 Specs Hashrate TH/s Power (Watts) 13.5 1350 985.608 Kilowatt hours Power Cost $/kWh $ Days in Month 0.05 49.28 monthly cost 30.42 January Purchase February Purchase March Purchase April Purchase Months to EOY USD Cash Flow BTC Cash Flow USD Cash Flow BTC Cash Flow USD Cash Flow BTC Cash Flow USD Cash Flow BTC Cash Flow Date USD/TH/Day BTC/TH/Day BTC Price S9 Price January $0.14 0.000013981 $10,300 $631 January February $0.14 0.000013154 $10,400 $516 March $0.11 0.000011014 $10,350 $293 February March April $0.12 0.000012339 $9,725 $219 April May $0.13 0.000016236 June $0.11 July $0.13 August $0.14 0.000013463 0.000015172 0.000016364 September $0.16 October $0.14 November $0.17 0.000016957 0.000015000 0.000016634 $8,130 $193 $8,200 $140 $8,700 $180 $8,800 $156 $9,200 $190 $9,600 $201 $10,100 $190 May June July August September October November December $0.13 0.000012816 $10,300 $170 December Profit USD Profit BTC IRR Payback Days