2. You die or disappear. Your children, loved one, the little good project you started to help somewhere will not get your dead or disappeared coins..
3. You think about not only yourself, like when you got enough from crypto and you need to think how you do good with your good coins...
4. .... add your own drama.
and also things such as BIP39[1] and all those other ways of using a Seed phrase come to work. you just write down the seed phrase on a piece of paper, and store it in a safety deposit box for case of emergency such as your demise or simply losing the wallet or hardware failure.
https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki
a1. kills anonymity,
a2. will need a creation in real life, where a small cheap device canbe attached to your body and get your DNA unique identifier sequence quickly and another device that can do this in reverse.
a3. ...
for a1, I guess we imitate the current system of exchanges: a middle traditional wallet (i.e. current 2017) is to be introduced which will use use your DNA-wallet as the identity verification is used today. a2: I am entirely certain that such devices will be around soon. It exist now but each test costs around 100-200 USD.
What do you people think?
interesting suggestions. here are two things that comes to mind
1. that device that you want to attach to the wallet needs to be cheap and reliable and easily obtainable. i don't think that is possible although i have never done any research in this matter.
2. the bigger problem is coming with a way to generate the private keys from the DNA data in a completely random way. and that is where you will encounter problems.
edit oh and i just thought about the worst part of this idea:
3. your DNA can easily be stolen. it exists in your hair, saliva,... and anyone can easily take it from you and generate your wallet and steal your money! you see this is the number 2 all over again, it needs to be random so no one else can generate the same thing again.