Bounties and Airdrops are simply a way for start ups to fund their marketing efforts prior to raising capital. They are designed to motivate people to do things that help with the marketing of the coin. There is no rule that says you have to do them. If you have the money you can always just pay for advertising. There is however one other thing that they indicate to potential investors that paid advertising does not. They show that enough people believe in the project that they will be prepared to be compensated for their efforts in the coin. I had a look at your project and the one thing that stood out is that you are a one man band with no one seemingly willing to attach themselves to your project. That would for me be a red flag and I would not participate in your bounty or airdrop if you offered one.