Addiction of anything has no cure because it become our habit and we are not ready to give up this one easily, so that is big problem which make our life so complicated and that is why so many people still losing more and more with hope to get back their lost amount there.
Addictions have cure, but it requires a lot of willpower, work, attention from family and friends, good circumstances and so on. Most addicted people have other problems, which prevents them from escaping their addictions, since they are always depressed.
Here's a good video about addiction: https://www.youtube.com/watch?v=ao8L-0nSYzg
Yes, but either way addictions are very dangerous, because they drain life. What even worse is when addiction also drains money, so addicts become poor very quickly and usually descent into crime.