Culkin was seeking to one up Russell Okung, the offensive tackle who started converting half his salary into bitcoin starting late last year. Okung's contract was for $13 million; Culkin's was set for $920,000.
The news of Culkin's dismissal comes on the day quarterback Tom Brady added laser eyes to his Twitter bio, a move that sent observers into a tizzy over whether the legend was also stocking up on BTC.
A call to Culkin's agent was not immediately returned.
Danny Nelson contributed reporting.