I think the most impressive thing about Bitcoin is the fact that it was created by one person and without any funds. Today even small projects have many people or teams working on them and involving investors' funds, but Satoshi manages to do everything himself! And that is also amazing, many people before he tried to make cryptography since the 90s and failed, but this did not make Satoshi no effort, even when others told him that this would not work, and I was amazed and impressed at bitcoin because bitcoin this does not use any capital at all, and I am very happy to go into bitcoin forums.