Hi there,
I want to launch my own online shop which will accept bitcoin as payment but I can't decide what to sell

Please post here what would you buy for bitcoins? Watches, video games, food ?
Thanks!
sell gold. The best way to transfer the BTC capital into fiat is via gold, so people will buy gold. The downside is, they might not trust a newcomer so your sales may be limited for some time. And depending on where you live, you may need a licence to operate