Bitcoin

Depends how you define “lost” BTC. 

This is a great overview of how much BTC is provably lost. It’s from 2019 so number is probably higher now, but at least gives an idea of the different ways lost BTC can be defined:

🇧🇷🇺🇸-  Book: Making Things Think: https://holloway.com/mtt. Investor in Wander, Carry, Footprint, Merkle Manufactory (Farcaster), Dynamic, Paragraph.

Depends how you define “lost” BTC. 

This is a great overview of how much BTC is provably lost. It’s from 2019 so number is probably higher now, but at least gives an idea of the different ways lost BTC can be defined:

https://coinmetrics.substack.com/p/coin-metrics-state-of-the-network-d2e