A way could be found to do this. Crypto is nowadays most people’s asset as it is easy to buy and track. No stress about any documentation like in case of properties and other assets. But there have not been much talks of people leaving behind crypto for their dear ones. Maybe it is newer but it does hold a lot of potential and would be perfect as inheritance.
It's a perfect inheritance when the right time comes. The value for sure has grown up and the inheritor will surely be happy with what you've left.
About paper works, you're right. Cryptos doesn't have that paper works for someone to inherit it. You just give your private keys or any log-in details if you're that type leaving your assets into exchanges and online wallets.