Bitcoin Core sees significant growth in development activity in 2025, reversing years of decline

BlockBeats news, January 5, according to TheBlock, Bitcoin Core saw significant growth in development activity in 2025, reversing a multi-year downward trend. Casa Chief Security Officer Jameson Lopp released annual data showing that Bitcoin Core mailing list traffic increased by 60% year-on-year, with a total of 135 independent code contributors participating in development. The amount of code changes reached approximately 285,000 lines, reversing the continuous decline since 2018, when the number of contributors peaked at around 193.