I've got a good amount of BTC in various exchanges and wallets. Each of these exchanges needs username, password, and 2FA code from phone to access. I'm looking for suggestions on a solution that, in the event of my untimely demise, my wife would be able to access everything. Let's throw in the option of my phone being destroyed along with me. I feel it was be near impossible for her to reset all the 2FA's. I'm thinking of typing up some instructions, laminating them, and storing in safe place. Thoughts? Suggestions? TIA!