You shoul read the next topic it is very useful

Using Locktime for inheritance planning, backups or gifts

Basically you need to tech them how to use bitcoin, wallets and other stuff. And keep a signed transaction for them, that is locked by that method. They should be able to broadcast it when the time arrive

Actually, this is something that I think have been discussed on this forum and board a couple of times in the times, but what I have to say is, if you are old or not so blessed with good health, i do not see why you shouldn't have someone in your family whom you trust enough to share secrets like this with, for someone that is married, I personally think your wife is the best person to share this secret with.

But here is what i think is the most important, she will have to be savvy with bitcoin and crypto in general, so if she is not yet into crypto, it is advised that you bring her, teach her all you know about crypto and also encourage her to make a few investments of her own in bitcoin, this way , she gets to understand perfectly how the entire system works. And this way as well, you are at peace with yourself since you already know that you have someone who knows exactly what you know about bitcoin and cryptocurrencies in general, and that if anything should happen to you, she will know how to manage all your crypto investments well just as you would have.

You are the one that can answer it, whether you let your family or at least your wife or your partner in your little secret about Bitcoin and the seed phrase. And that is if you really trust her to give everything even if you are still alive.

As far as your second question, maybe you can dig on this old threads here:

• Please review my inheritance strategy
•  Bitcoin Inheritance Protocol with delayed broadcast (improved Dead Man's Switch)
•  Using Locktime for inheritance planning, backups or gifts
•  Death & Bitcoin: How I Prepared My Family’s Digital Inheritance
•  HOW DO WE TRANSFER BITCOIN WEALTH TO HEIRS AND THE NEXT GENERATION
  

You know, it's a good idea to have a plan for passing on that seed phrase to someone you trust in case anything unexpected happens. Life is short, my friend, and you never know what might come your way. Sharing the wealth, so to speak, with those you care about while you're still here is a nice thought. As long as they're trustworthy and know how to handle crypto stuff, there shouldn't be any issues with that.

I believe there is already an extensive discussion in those threads with several suggestions made that can be implemented even by those who are not tech savvy. Even though some of those threads are locked, I don't know if there is any new discoveries that can be discussed here.

You don't have to show your seed phrase to your family until your dead, you can hire a lawyer and create a will where you write your seed phrase in a paper or something that can't easily be destroyed and then put a clause in your will that that document that stores your seed phrase can only be accessed by the people that's on your will. Regarding your second question, I don't think you have to think about it right now, live in the moment, thinking when and where you will die will only fill your heart with dread and that's not the way to live imo.

What @albert0bsd said can help you a lot, take the time to read the link he provided.

Well, if you are going to introduce your family to the basics of Bitcoin and give them instructions on what to do in case something happens to you, you are automatically allowing them access to your funds. I'm not against it and I really think it's an important security measure to be adopted, because accidents happen and we are unable to predict the future. Just make sure the family members you are going to communicate on this matter are trustful people who won't cheat on you in anyways.

However, if you aren't 100% sure about their trustworthiness, I would say it's better to let your BTC holdings sink in the depths of the unknown digital universe forever than giving them any relevant information...

You should ask yourself that first because the person who knows your family members better is you. Once you find the answer, you can know what to do. We can advise you to show your initial phrase to your family and make a will for one or several family members you trust.

But you can also keep it a secret from your family members while still looking for the right way to reveal it to your family members. Everything you will do depends on your trust in your family members. If you can't trust one or more of your family members, maybe donating their Bitcoin is how you can do it.

Or you can sell the Bitcoin when the price increases very high. After that, you can distribute the money from selling Bitcoin to your family members so they don't need to know about your Bitcoin. There are many suggestions for what you can do, but it depends on the circumstances of your family members.

You can create a multi-signature wallet, give them one of the keys, leave the other in a safe place that they can find by reading the will, and the third in a bank safe that they can access after confirming your death.
Learn how to make it using [Tutorial] Passport-Sparrow-multisig wallet.
If the number of your family members is large, you can create more signatures, but at some point you must trust two or three of them or in a safe place that they cannot access until after your death. This way you will guarantee that they will get it, but you will not guarantee that they will use it well, so you raise them financially independent will help with that.

Depends on you. If you want someone you love to inherit your bitcoin, let them know. If you don't want anyone to inherit your coin, keep the secret for yourself.

If you don't leave any wallet backup, nobody will get access to your wallet backup and your bitcoin will be a donation for everyone. Like a lost bitcoin, it is a donation for everyone.

Dying bitcoins