Investing in tokens are good investment for someone that wants to have a long term investment .
Tokens used to provide a users to use a platform or reward users for their been part in the platform.

Exchange tokens give encouragment for users to use the exchange, and they are also used to reward users for their loyalty. They are often used to fund development and marketing efforts, as well as to provide liquidity to the exchange. The performance of these tokens nevertheless have significant impact on the success of the exchange and how investors perceive the exchange. As such, exchanges operators will monitor the performance of their tokens and take steps to ensure that they remain attractive to users.

There is nothing such as “a good investment”
As long as investment is concerned , all investments either by buying Gold , Investing in Buildings, company, big jets etc.. all come with a particular level of risk(losing some or all your capital) , in fact all investments in its nature is risky , Your concerned shouldn't be whether its good or not but rather the level of risk .

You can start testing the depth of the water by putting in one leg(investing small capital which you are willing to lose ) and see how far it goes.