WHY THE HECK IS FUTURE TRUNKS SO STRONG?!

 Hey guys!! On Wednesdays I will be posting questions I have on different anime, and I want to hear your thoughts. Today's anime question is; WHY IS FUTURE TRUNKS IN DRAGON BALL SUPER SO STRONG?

Before you tell me that his reality has been so life threatening (having fouught Cell, the Androids, and other strong adversaries), I accept that fact but in Episode 61 of DB Super, Trunks released some sort of GOD FORM!!


Now can someone tell me how is this even remotely possible?! If Trunks can release a god mode, is it then fair to say that all of the Saiyans (Goten, Gohan,etc) have the capability? How has Trunks obtained this new power, despite never ascending above Super Saiyan 3 (I wonder the same for Vegeta but let's not go there) ? Is he some sort of missing link to the Super Saiyan God Form?