Three S&P 500 companies hold bitcoin on their balance sheets — Block, Coinbase, and Tesla. Strategy could be next. GameStop bought $500M of BTC. If you own index funds, you're gaining bitcoin exposure whether you planned to or not. Every time a public company adds BTC to its treasury, index funds holding that stock absorb bitcoin exposure automatically. Your 401(k), your IRA, your brokerage account — all quietly stacking sats without an active decision from you. This creates a self-reinforcing flywheel: bitcoin rises → these companies grow → they become a bigger piece of the index → more passive capital flows in → they buy more bitcoin → bitcoin rises further. The FIRE community has long dismissed bitcoin while investing heavily in VTI. Now VTI itself is becoming a bitcoin vehicle through the companies it holds. Mr. Money Mustache called bitcoin "stupid" — his portfolio is accumulating BTC exposure anyway. The era where bitcoin required an active choice is ending — now it's flowing into portfolios on autopilot. I break down the passive bitcoin flywheel — how ETFs, 401(k)s, and index funds are making bitcoin adoption automatic → https://firebtc.io/p/the-era-of-passive-bitcoin-flows