High-rolling investors have positioned themselves bullish on BILL Holdings (NYSE:BILL), and it’s important for retail traders to take note.\This activity came to our attention today through Benzinga’s tracking of publicly available options data. The identities of these investors are uncertain, but such a significant move in BILL often signals that someone has privileged information. Today, Benzinga’s options scanner spotted 15 options trades for BILL Holdings. This is not a typical pattern. The sentiment among these major traders is split, with 53% bullish and 20% bearish. Among all the option…