Regardless of your purpose be it performance enhancement, TRT or a full blown HRT program you will be very hard pressed to find a better testosterone than Testosterone-Cypionate. In the world of TRT most will find 200mg every 7-10 days to be fairly common place and generally speaking about as high as you’ll ever go but of course in performance enhancing doses will necessarily be much higher. For the performance enhancer minimal dosing will generally be in the 400mg-500mg per week range and most commonly split into two even doses twice per week; for example, for 400mg total per wee k you might administer the hormone at 200mg on Monday and 200mg on Thursday continuing such a schedule until your total duration is complete.
For many 500mg per week will be as high as they ever need to go but in more hardcore circles it is not uncommon for doses to reach levels of 1,000mg per week and at extreme elite levels, especially in competitive bodybuilding they can go much higher. Keep in mind, while the benefits of use will increase as the dose does so will the potential and probability of adverse effects. There is a strong risk to reward ratio at play and in the end you are the only one who can determine how far you want to go with that. Yes, absolutely anabolic steroids and especially those of a pure testosterone nature such as Testosterone-Cypionate can be used safely and effectively but responsible use will always prove to be the ultimate key.
Part of responsible use will always include what is known as a Post Cycle Therapy (PCT) plan in order to normalize the body after use has been discontinued. Recall, the use of such hormones as Testosterone-Cypionate will suppress natural testosterone production but natural production will begin again once use is discontinued; however, such production will not begin instantly and there are things we can do to speed up the process. The sooner we get our natural production back up and running the more progress we made through our anabolic steroid use will be kept but most importantly our overall health will be protected; recall yet again, testosterone is essential to our health. This is where a good PCT plan comes in and it is by this plan we can stimulate natural production to begin; common supplemental items often include SERM’s such as Nolvadex and Clomid as well as the hormone hCG .
The rise in testosterone levels during competition predicted aggression in males but not in females.  Subjects who interacted with hand guns and an experimental game showed rise in testosterone and aggression.  Natural selection might have evolved males to be more sensitive to competitive and status challenge situations and that the interacting roles of testosterone are the essential ingredient for aggressive behaviour in these situations.  Testosterone produces aggression by activating subcortical areas in the brain, which may also be inhibited or suppressed by social norms or familial situations while still manifesting in diverse intensities and ways through thoughts, anger, verbal aggression, competition, dominance and to physical violence.  Testosterone mediates attraction to cruel and violent cues in men by promoting extended viewing of violent stimuli.  Testosterone specific structural brain characteristic can predict aggressive behaviour in individuals. 
Androgens are responsible for the growth spurt of adolescence and for the eventual termination of linear growth which is brought about by the fusion of the epiphyseal growth centers. In children, exogenous androgens accelerate linear growth rates, but may cause a disproportionate advancement in bone maturation. Use over long periods may result in fusion of the epiphyseal growth centers and termination of growth process. Androgens have been reported to stimulate the production of red blood cells by enhancing the production of erythropoietic stimulating factor.