You very much would want to keep it guarded until you have secured your goal. Bootstrapping the singularity is unlikely to be achieved with a single applicatio

You very much would want to keep it guarded until you have secured your goal. Bootstrapping the singularity is unlikely to be achieved with a single application of a time machine since you are only sending information to the past, not the technology itself. And repeated application allows other actors to intervene during each iteration, which may result in the CTC settling into a different fixed point than the desired one. You can't expect to own and use a time machine and be left alone while doing so.