How much does a blockchain developer earn

Want to become a blockchain developer here is a list on how much to earn per experience:
https://www.dappuniversity.com/articles/blockchain-developer-salary

TLDR:
Experience: 0 years software experience, 0-1 years blockchain
Salary: ~$110,000 per year

Experience: 1-2 years software experience, 0-1 years blockchain
Salary: ~$120,000 per year

Experience: 2-4 years software experience, 0-1 years blockchain
Salary: ~$124,000 per year

Experience: 2-4 years software experience, 0-1 years blockchain
Salary: ~$143,000 per year

Experience: 6-10 years software experience, 2-4 years blockchain
Salary: ~$153,000 per year

Adding self employed trader after reading comments