If blue wallet disappears in the future, it is not an issue at all. If you still have your 12 (or 24) words and keep them safe, you're always in the possession of your Bitcoin.
Your Bitcoin is your 12 (24) words.
You can import them to any bip39 compatible wallet to interact (sign your transactions) with the Bitcoin network.
Another watch only wallet is e.g. sentinel by Samourai.
This might be what i move my stack to for long term storage. I have heard of Sentinel but never understood it. I’m interested now. What I liked about it is its available on F-Droid.
Please 🙏, first make sure that you know what you're doing.
Test the restore procedures in order not to lose your funds.
video on sentinel
Thank you. Just finished watching the video. I will have to rewatch a few times before I give it a try. I’m pretty slow with learning this Bitcoin/wallet stuff. Scary to make a mistake. Ill have to transfer my funds from Muun and Alby over to it. Lots to figure out.
Thank you for the guidance! 💜🫂
