Because BTC relies so heavily on supply and demand with a limited supply, Vcs, and companies are all buying BTC, Boomers are now buying BTC due te ETFs, so the supply cant j crease but the demand keeps increasing, Which drives the BTC price up, eventually over enough years price may halt, but thats still FAR from now, so lets say. Price to keep your machines running doesn’t increase as rapidly as BTC price. Over time you get more bang out of your bucks, as price increases the less BTC you need to sell to fund your operations.
My point is as BTC price keeps rising, you get to sell LESS BTC to get the same amount of cash to fund your operations. AND you get to hold more BTC which you can sell into cash when you need it. If you get 6 btc at 20K, and you need to spend 30k to fund it, you need to sell 3 BTC If you get 3 BTC at current price you need to sell 0.5% of a BTC to fund the same operations with larger profits
Over time that just increases quicker than math problems can become more complicated.