~ you noticed a pattern, and had been exploiting it for some time. But since bets are random (allegedly), the patterns are random too (necessarily), so it shouldn't in fact have surprised you (had you been aware of this intrinsic property of genuine randomness at the time) that your "strategy" stopped working after some time as another pattern had most certainly revealed itself (which you failed to discover and take advantage of). Patterns are random, but their existence itself is not random at all. It is a feature of a truly random distribution
But the discovery of such patterns can happen only by chance, right? And we have no way of knowing how long they are going to last, right? Or, are we just in the early stage of understanding how it really works? What if the ancient philosopher Democritus, who formulated an atomic theory of the universe around 400 BC, was right saying that randomness is a subjective concept that originated from the inability of humans to understand the nature of events?