A humble disclaimer for the "Okay So Your Bank Account Is Frozen" Starter Pack.
Bitcoin is not perfectly private, nor is it perfectly unconfiscatable, or perfectly censorship resistant. It's not accepted for payment in most places, the price is highly volatile, and while it seems like the right solution for the future of money, nothing is certain.
Other popular options include Phoenix, Blue Wallet, Simple Bitcoin Wallet, Blixt Wallet, and Samourai. Each one offers a slightly different usability / security / privacy tradeoff.
For more privacy and security, you can run your own Bitcoin "node" at home and control it with an app such as Zeus. This will remove even more potential vectors for censorship, at the cost of a more time consuming setup process and some usability tradeoffs.
Because Bitcoin is not accepted at most businesses, if your concern is having money for basic necessities then physical cash is still king.
The exception would be if you fear being searched (like at a border crossing, for instance), or if your local currency is undergoing a hyper inflation event.
The general rule of thumb is that a mobile wallet should hold as much as you'd typically keep in a physical wallet, up to perhaps as much as you'd keep in a checking account.
Risks to mobile wallets include the loss or theft of your phone (this is why offsite backups are so important), but unfortunately also include the fact that our governments and other bad actors have methods of hacking into phones, making anything that happens on that device potentially under threat.
This guide was designed for someone who has already been targeted, with their bank account frozen and presumably their Bitcoin exchange accounts locked down.
If you haven't yet been targeted, now is the time to get your money off an exchange and safely into your own custody.
Bitcoiners typically refer to this as "cold storage" for long term holding of Bitcoin, as opposed to a "hot wallet" like on a phone that holds Bitcoin you plan to spend in the near term.
It's common, though not necessary, to use a "hardware wallet" like Coldcard to help with cold storage. You can even build your own hardware wallet with the SeedSigner project.