The significant option activity, specifically the sweep of 2049 calls at $0.17 for a strike price of $5.5, indicates that investors are expecting the price of Fisker Inc. (FSR) to rise. This is because buying a call option allows the holder to purchase the stock at the strike price, in this case $5.5, at any time until the option expires, which is on Friday. If investors believe that the price will be higher than the strike price before the expiration date, they will profit from exercising the option. Therefore, this activity suggests a bullish sentiment among investors.