Python, JavaScript, C #, C ++, Rust, Golang, Solidity, Java and Simplicity are the languages used in cryptocurrency software, I'm trying to find out which one to start with, and I'm listening to your thoughts here. So my decision will definitely start with researching blockchain technology and the technologies of cryptocurrencies.
Thank you for your help and sharing your thoughts with me.

If you have mastered many programming languages you are ready to become a blockchain technology developer. You also have to know and research what blockchain technology and cryptocurrency are, you have to really research them from the smallest to the knowledge and problems that occur in these technologies.
If you really know many programming languages you can contribute to this forum. This forum needs people like you, if you really have the skills.