Unlike regular money, which have a centralized source, cryptos are harder to inherit, since, if the original owner of the private key didn't give it to you before he passed away, then you can say good bye to those money.
Leaving aside the people that simply forgot their private keys and that sent coins to wrong addresses which have no user behind.
In 50-100 years this might be a big issues, making the actual amount of usable Bitcoin (or other coins) much lower than it should be.
What do you think?
Well, I only have a silly idea of writing your private key somewhere else and storing it until you die. A person may organize a system that activates on your death - maybe a lawyer will suddenly appear on your offspring's door post and tell them, "well, there's a thousand of bitcoins left for you, etc etc." But of course, this idea has a lot of loopholes, considering the trustworthiness of the private key keeper and a lot of factors.
Since cryptocurrency is still in its infant stage, there will be a lot of things to consider regarding crypto currency inheritance. These things are:\
1. Lack of security regulation - there's no safety net for a person who loses his access to his wallet. The only string connected between you and your coins is your private key. Once it is compromised, say goodbye to your coins.
2. Fast technological changes. Consider this possibility: Quantum computers vs. Blockchain. Unless developers will fastly develop and upgrade a blockchain that is quantum resistant. When quantum computers win, the coins you leave for inheritance will be compromised.
3. Decentraization - Many people can claim that the crypto currency in a wallet of a deceased person is theirs. Plus, if crypto wants to remain decentralized, the community will resist many regulations the government will apply to it.
4. High volatility - there's no way of telling how much will be the value of a coin 20-50 years from now. Just look at the long list of coins that lost its value overtime. What makes you think bitcoin and ethereum is exempted? I can only imagine the chaos while splitting it to your children.
5. Issue of trust - will you trust your private keys to a specific person? This is an issue that needs to be considered because in cases of sudden death, you will bring the information of your private key to your grave and the inheritance is lost forever.
But I still have faith that this issues will be resolved eventually.