There are solutions to this problem being implemented right now. One of these is a platform called DigiPulse. It allows you to create a decentralized vault that you can store your private keys or any other digital assets and they will be only viewed by you. You then designate a person or people who you want to inherit the contents of this vault. The service is operated by you paying in increments with their utility token DGPT. Whenever you stop paying the DigiPulse will contact your inheritor and have them verify their identity and they will gain access to the vault.
Its a really cool idea since most are sugesting leaving behind some physical item such as a paper wallet or hardware wallet with a lawyer or a 3rd party. The thing is this is risky as they could be stolen or misplaced. I tried the beta and its really easy to use, id suggest anyone interested to give it a go its on their website, digipulse.io
The vault is kind of whatever to me. What I really like about Digipulse is their activity tracker. Trying to compete with the various storage providers is a crowded space, but the activity tracker that can connect via API to your gmail, facebook, Steam, Battle.net, Instagram, Twitter, etc. combined with the decentralized storage vault is golden. DGPT combines both functions together so it know the last time you logged into any one of these platforms. If you don't log into any of them, within the allotted time that you determine (1 week up to 3 months), then the service will automatically contact your inheritor that they have a vault waiting to be claimed. You can store private keys in the vault, videos, photo's, etc.
That solution at this point is a lot easier than teaching my parents about crypto, my wife about crypto, etc. Parents are a lost cause at this age, and the wife is a long term play to educate on crypto security. Hard enough to get the wifey to look at crypto as anything but funny money.
I would never ever put crypto in a will because anyone that has access to your private keys can pretty much do whatever they want with it. If you are smart and educated in blockchain/crypto, and happen to be in a position to access wills, they'll never be able to tie the crypto back to your lawyer/accountant who may have stolen your funds. They can easily move the coins off to a wallet like exodus. Convert it into BTC/ETH or send the tokens/coins to a DEX and convert to BTC/ETH. Then move those funds around slowly to binance through a non KYC account/multiple accounts and buy privacy coins. Move privacy coins through to KYC account with larger limits and convert back to BTC/ETH. Sell to fiat. The faster this is done that harder it is to stop as well.
Ideally, i'd like to have all my inheritors knowledgeable about crypto security and private keys as well as a service like DGPT or better.