70% of All Bitcoin Bought This Year Comes From One Source — And Today Is the Last Day

Before the Consensus Catches Up

One engine has driven Bitcoin’s 2026 rally. It runs on a monthly schedule, it belongs to a single entity, and it accounts for 70% of every dollar that has flowed into Bitcoin this year. Today is the last day it runs this month.

This report maps the mechanism in full: why ETF inflows have collapsed to a fifth of their 2024 pace, why retail has rotated out, and precisely how the buying cycle creates, and then removes, Bitcoin’s only structural bid. If you have been trading Bitcoin around macro catalysts, Fed speakers, or ETF headlines, you have been watching the wrong clock.

After today, the largest buyer in the market goes silent for roughly three weeks. What fills that vacuum, which price levels matter during the pause, and how to position before the June window opens is what the rest of this report covers.

We also outline a concrete trading strategy for positioning around this monthly calendar effect.

Bitcoin ETF inflows (LHS) largely absent with a negative funding rate (RHS)