0.0117 {£285) away from my first Bitcoin goal. 0.1. DCA strat is going well.

As some of you may have seen I was considering getting a loan for 25k to go buy a bitcoin. I'm not sure whether it was fortunate or unfortunate but thank said no. I'm cool with it though I'm pushing towards earning more to buy more, haven't got the side hustle paying yet but soon enough I hope. Are they any others ways outside of mining that can be used to generate BTC. I've been thinking of making some apps that are completely ad free and provide value to the end user. Then leaving a wallet address at the bottom, kind of like buy me a coffee but for BTC. Any tips would be great?