Airdrop and bounty campaigns are more aimed to raise awareness about your ICO within bounty hunters. So, those community activities are just there to help you spread the word about the project & solution and get initial interest. Be careful with token allocation.
In order to reach to investor's poll, you need to conduct investor research as well as to prepare good assets - regarding those assets (OnePager, AMA session record/article, Testimonials, Good and Direct Pitch deck, Long term partnerships - make sure you give all information to investors which are needed for making a decision. Moreover, register your ICO in listing websites where real investors always visit for finding new projects, Our company has created a one-stop ecosystem where traders can exchange cryptocurrencies, launch ICOs, list ICOs, provide marketing and partner programmes, offer online and offline community centers, and Blockchain consultancy services. #HIghBank platform, supported by latest ML and AI models, would help spread risks by allowing traders to diversify their portfolios. You can check more about us on our website.