For years, Bitcoin’s most devoted holders treated self-custody like a religion. Not your keys, not your coins. Now those same believers are quietly handing their coins to Wall Street, and the numbers tell a story that would have been heretical just a few years ago.
Approximately $3 billion in Bitcoin was transferred into BlackRock’s iShares Bitcoin Trust (IBIT) around the end of 2025, a move that coincided with the first observed decline in self-custodied Bitcoin in roughly 15 years. The implication is hard to overstate: the people who have held Bitcoin the longest, through multiple crashes and crises, are voluntarily moving their assets into the same regulated financial infrastructure that Bitcoin was originally designed to circumvent.
The great migration from wallets to Wall Street
The shift isn’t about selling. ETFs like IBIT allow holders to maintain exposure to Bitcoin’s price without keeping coins on the blockchain themselves. Think of it less like cashing out and more like moving your gold from a home safe into a bank vault. You still own it, but someone else handles the security.
The motivations are pragmatic rather than ideological. Enhanced tax treatment tops the list. ETF shares slot neatly into existing brokerage accounts, simplifying everything from compliance to estate planning. When Bitcoin sits in an ETF inside a Fidelity or Schwab account, your financial advisor can actually see it, model it, and rebalance around it. For large holders managing multi-million-dollar portfolios, that visibility isn’t a luxury. It’s a necessity.
