There is no second best 21 lessons... https://21lessons.com/ nostr:nprofile1qqsxu35yyt0mwjjh8pcz4zprhxegz69t4wr9t74vk6zne58wzh0waycpt3mhxue69uhhqun00pujumn0wd68yttjv4kxz7fwv9c8qte4vscxgvecv9nxxdpevv...

#Bitcoin taught me that the internet is a good thing. nostr:nprofile1qqsxu35yyt0mwjjh8pcz4zprhxegz69t4wr9t74vk6zne58wzh0waycprpmhxue69uhkv6tvw3jhytnwdaehgu3wwa5kuef0qy2hwumn8ghj7mn0wd68ytn00p68ytnyv4...

#thankgodforbitcoin https://blossom.primal.net/0cb964db33c1167ee4d4720d711a810b28ab9336ecea7f6c350e05c6ccfd76b1.jpg

https://blossom.primal.net/6b7d1150111ca6afec9c726d02220b645caf15a8c1b91dc254b44e3aee298a42.jpg nostr:nprofile1qy28wue69uhnzv3h9cczuvpwxyargwpk8yhsz3rhwvaz7tmed3c8qarfxaj8s6mrw96kvef5dve8wdrsvve8vv...

Give me a quick answer to these  3 questions without looking it up: How long is a million seconds? How long is a billion seconds? How long is a trillion seconds?

“The network timestamps transactions by hashing them into an ongoing chain which serves as proof of the sequence of events witnessed” https://image.nostr.build/5593da92111629bbde12ac6de7ee53e50521...

https://i.nostr.build/viNDSg6j7oJTryUR.png