Legalizing Amphetamines

Amphetamines should not be legalized. Nowadays the topic of legalizing some drugs is brought to discuss by many people. If we talk about marijuana, I will say that it is worth to consider. But as for amphetamines, which become a big problem in many countries, I don't think they should be legalized. First of all, amphetamines have many bad effects. They are addictive and dangerous. They cause many health problems, both physical and mental, to the users. When using amphetamines, users develop a rapid tolerance to the drugs and have to increase the dose to reach their desire and eventually become addicted to them. Long term use of amphetamines can result in depression, insomnia, Amphetamine Psychosis and aggressive and suicidal behavior.
So how can we prevent these incidents when we permit thing that can cause them.
Some might say why don't legalize amphetamines so that we would be able to control them. I don't think that will be effective because when you legalize them, it means that you are telling people that it's ok to use them.
And that won't be good. There will be more people turn to amphetamines as a recreation or a performance enhancement, more people addicted to them, more money wasted on buying them and more crime caused by them. Then we find ourselves back to the same or may be worse situation. So how can we call that a control.
Moreover, if we make speed legal, then people want coke, then heroin and etc.
Legalizing amphetamines is a very risky solution. In my opinion, it is better to continue using the present measure. The regulation and the punishment of amphetamines are acceptable but these are just the way to deal with them when they have already been used. Therefore, we should also prevent people from using them by educate them, tell them how bad amphetamines are and most important improve their living quality because when people are happy, amphetamines or any other drugs won't be necessary