I have learned quantum physics for 6 years. During university, I have been trained for ICPC for 3 years. Then, I have studied about pattern recognition and AI for 1 year. I have developed DL for 1 year. After that, I have developed cv projects for 3 years, like fingerprint recognition engine. Nowadays, I have participated in developing DApps and I have learned theory of blockchain.
I saw a baby who use bitcoin.