no one can guarantee a good bounty until now even campaign managers can not guarantee it.
it is now important to use all your efforts to the maximum extent possible to minimize failure.
use your experience and research on the project and I suggest always follow the bounty that when pre ICO reach hardcap.
Of course, when it comes to investments, this is a good indicator, which you set an example. Here, only investments during the company's ico or participation in the Bounty of the company must be preceded by some kind of action to make the right analysis and choice. But if the company collects a hard cap even in time pre ico, then you will not have time to do anything.