The available info we put here is not to give you paranoia, just to get a few thoughts out there, since you are now taking this.
If you read the conclusion of the article I linked, they do recognise the cancer findings of various published studies but also highlight the ones where PPARδ did not increase cancer cell growth.
Cardarine appears to be a more selective PPARδ agonist in humans than in rodents, so that's another thing to consider when you look at how the animal findings were translated into possible human data in a way that may not be reasonable.
So, have a go and see what it can do for you, if anything.
It's not like you will be taking it non stop for months on end.
But if it ends up creating more anxiety and doubt than anything else, you know what to do.