Do what makes you happy and of course money but always plan for a need to pivot. I started with a cricut in 2017 just to make myself tshirts with funny sayings since I was a 4x and wasn’t gonna pay $60 for someone to make me a shirt. I didn’t post to sell but somehow decals for our Jeep and shirts turned into making epoxy tumblers and growth so fast I burnt out. Covid hit and while I stayed with my cups I added boxes for holidays and then we pivoted to sublimation shirts and then 3D prints and automotive accessories and now my husbands auto stuff hs had to seperate from my business and his has just made more than my tumbler business made. When I started selling I refused to do a business that would take from my family. I worked for a tax company back then and managed to be green the first year, we made money didn’t lose any. Same for yr 2 and 3 but Covid crafters hit strong in tumblers and while mine are unique I saw signs soon enough to know we needed to pivot. Always have a backup plan that can be bigger than the first plan. And never stop researching your niche even when you think you have it down all small businesses grow with options and technology there’s no standing still