If you are uncertain about both the magnitude and the timing of the underlying asset price increases, an alternative strategy is to turn to a shout option. The latter allows you to lock in the intrinsic value of the option at any time prior to expiry--an action referred to as a " shout ", thus providing the following payoff at maturity (for a call):
A shout option is valued in much the same way as an American option (Windcliff et al., 2001).
They also have many advantages compared to other options that allow their holders to << lock in >> positive intrinsic values prior to expiry, such as ladder or shout options. In particular, unlike ladder options, they do not cap the greatest possible intrinsic value from the start, and they do not require their holders to have precise anticipations on a set of target price increases in the underlying asset.