Reasons why your code should be open source

Customization:
Open source codes can easily be customized or accessed to meet the user’s needs. The user can spot possible liabilities/drawbacks which can occur in the future as a result of underlying problems with the code or method of payment, which you can easily curtail before the release of your tokens. It also allows for idea contributions and open suggestions. The community often contributes to your code by reporting bugs, or even submitting proposed fixes.

Bug Fixing:
All software releases contain bugs. Making your code open source give you the advantage of users spotting bugs you missed. As a large number of users can access your codes, bugs tend to be easily visible and rapidly corrected.

Becoming part of the community
Adopting the open source method, you become part of a community of users who in turn will have an interest in knowing what you offer. The extent to which you engage with this community is up to you, but it  will be of an added advantage.

Maintaining your commitment:
The success of building a clear and good relationship with your investors or buyers requires an open and honest approach to the project and reasons why you are doing it.  Combining this with an ongoing commitment, will help you easily get customers, buyers,, underwriters  who will all recognize your organization and its offerings.

Customers
Your token buyer should be categorized into four
1.Investors
Investors are early buyers who give the project the needed finance for some tokens/shares/form of ownership. Investors are always at the advantage and also at risk, and this is because an investor tends to get more profit than future buyers after the completion of the project, if the project fails, there will be no guarantee that the investor  will get his money back.
2.Natural Buyers
These are the set of buyers that buy tokens in exchange of other tokens or to sell.
3.Underwriters
These set of people help you decide on which ICO you should invest on that will be profitable. They research on coin offerings, providing answers to early buyers and future buyers, who might have no idea how to go about their investing in cryptocurrency.
4.Traders
These set of buyers participate more in the selling and the buying of tokens. They are more interested in the increasing value of the product and how they can profit from it.

Opensource
In making the code used in creating your tokens opensource, you give buyers the chance a view your codes and through that gain some confidence in your ICO. Non-profit finance organisations make their projects open source by creating and selling tokens, which are then needed to utilize the technology. If your project is not open source, you should have a strong reason for that. Either for the purpose of privacy or security. If your token is really valuable, it could be the best option to make your code opensource.