Hi,
I have been searching this for a while now and have many options while considering which wallet to use. My requirements are as follows:
1) Only holding BTC
2) Must not have battery preferably
3) If the wallet company shuts down so I still have access to my crypto say after 20 years even
4) Must Be cold wallet completely.
My options are Tangem, but there are some concerns like the wallet has only one address, so basically anyone with your transaction address, has a window to your entire portfolio, so no for me as well what if their app goes down after company shuts down.
Trezor, again it has firmware updates and read quite alot about it if it fails then it's stuck there or the battery issues plus it is above my budget.
So please suggest me some decent wallet not really high price. Just something that stays there and stores my crypto for the long term.

