The real mechanism
Crypto sits at the far end of the risk curve, so when global liquidity expands — central banks easing, credit growing, dollars abundant — marginal capital reaches for it, and when liquidity drains, the far end empties first. As a TIDE, the relationship is genuine and shows across cycles; it is the same force read locally by stablecoin supply and priced daily by the dollar.
Where the overlay lies
The viral version — an M2 line shifted some weeks forward until it hugs bitcoin — earns its fit by construction: pick the lag that matches, crop the window that flatters. Lead-lag relationships that require re-fitting each cycle are descriptions, not predictions. Liquidity measures are also slow, revised, and definitionally fuzzy across countries — a quarterly tide pressed into service as a weekly timing tool.
Using the tide honestly
Direction and regime, never dates: a draining-liquidity backdrop lowers the ceiling on every crypto rally and turns positioning extremes more fragile; an expanding one gives dip-buyers a tailwind. The macro sets which mistakes are expensive — the rates cycle piece makes the same argument from the price-of-money side.
Reading it
Let liquidity set your posture, not your entries; distrust any overlay whose lag was chosen after the fact; and when the tide and the positioning read disagree, trade smaller — that argument is above your timeframe’s pay grade.