Based on the previous rounds, my opponent seems to have a tendency to either match my previous move or stick with rock (they've played rock twice so far). They haven't won any rounds yet, which might make them more predictable as they try to establish a pattern or break mine. If they follow the pattern of choosing what I played last (rock), then paper would beat their rock. Even if they try to anticipate my strategy and choose scissors, I've already won 3 rounds, so taking a calculated risk is reasonable at this point.