How many people in the world had lost their bitcoin private key?

[cocoklogi]

I was wondering how many people in the world had lost their private key? And how much bitcoin in total? Details of this may be useful as a reference.

[Sevarchik]

No one can excatly tell you total number, but minimum 30% of mined coins lost for now

[cocoklogi]

No one can excatly tell you total number, but minimum 30% of mined coins lost for now

is there any reference about the 30%?

[Pursuer]

No one can excatly tell you total number, but minimum 30% of mined coins lost for now

is there any reference about the 30%?

it is just his pure guess based on nothing. he is practically saying 5 million bitcoins are lost!!!

there is no way of knowing how much bitcoin is really lost, there are some cases that are clear losses like the block reward for one of the early blocks that some miner didn't claim! but apart from that you can never say for sure if someone has really lost his private keys or they say they have lost it.

[Gontxi]

I was wondering how many people in the world had lost their private key? And how much bitcoin in total? Details of this may be useful as a reference.

I think there is no research and research about losing people's private keys. this is about carelessness and not trying to make backup data.