If you have option of staking some tokens, then it would attract peole to invest even more in your ico. Everyone likes passive income.
It’s a good idea, for example, it would be possible, for example, to pay part of the company's profits to the holders of tokens, as implemented in some projects. Thus, the price and liquidity of the token grows, which is important for any project.
There is no staking (understanding as "looking tokens") but 2gether is planning great things for holders (which is basically the same thing, easier).
Benefits will be linked to the amount of 2GT tokens held by each user : a hierarchy system will reward those who put more skin in the game and have larger 2GT token positions
Some of these benefits currently planned will be related to the card design, app features, or higher rewards (as every user may be rewarded when sharing data, buying services, etc.), and I guess other will be thought later, when the foundation of the service will be there.