If the price of BTC rises vs SGD in the month, then your expenses are less for that month (and the opposite is true if BTC falls). The idea here is that as Bitcoin’s value increases (BTC price since 2020 is up 400%. One is with BTC margined derivatives contracts that BitMEX.com offers, and the other is just spot selling the amount of BTC you need to pay fiat expenses. This way, you won’t be exposed to the price of BTC, and there’s a chance to earn yield via the funding rate. On the flip side, your pay could fall from 2.6 BTC to 2 BTC as the cost of your labor falls against Bitcoin.