I started selling things around the house and buying Bitcoin with the proceeds

I started selling things on EBay, StockX, Goat, and facebook marketplace to DCA bitcoin with. All profit I make goes to bitcoin, and the original purchase price I’ve been reinvesting in goods I can resell. I’ve been going to target and scanning things on the clearance rack, thrifting, and reselling sneakers. I’ve been trying to find other ways to fund my bitcoin buying other than my main income. Is there any ways other than selling stuff that you earn extra money to invest? Thanks!