Is bitcoin’s 4-year cycle over?

Nobody knows.

Bitcoin's “4-year cycle” is a market theory, not a fixed rule. The timing of bitcoin's halvings is predictable, but investor behavior, liquidity, regulation, monetary policy, and broader market conditions are not. A cycle can arrive earlier, later, or look different from prior cycles without proving that the pattern has permanently ended.

Historical cycles can provide useful context, but they cannot determine the timing or shape of bitcoin's next market cycle.