Testo boosters while still riding high?

I’m 18 years old, pretty strong and probably considered an easy gainer (if there are any such things) by most standards.
I was wondering if its worth for me to use Tribex or any other testo booster, considering my young age and thus, my already high testo level. And, when coming “off” tribex, will I keep my all my gains even as my testo level gets lowered?
Please, I want as many opinions on this as possible!
Yours humbly,
Attila.

Just thought I would mention again that
this myth that 18-year olds have unusually high testosterone levels is just that, a myth… on average, men in their twenties have slighly higher levels than 18-year olds do.