1. BTC. Okay this one I get but the convenience of GPay for my RedotPay makes it a little bit hard to migrate 2. OpenStreetMap. Okay this is new, but you can't login with nsec? 3. There's Nostr client like YouTube? 4. Photos. Same like no. 1 but I don't have the hardware and capacity for local backup. I get it but not suitable time for me to migrate. Thanks for the answer brother. ✌️