you can search the whole disadvantages and advantages of it,its so easy or may this issue belongs to beginer's section...Anyway  most  of cryptocurrencies are created on blockchain technology,which is already used in a lot of ways even by goverments for their institutional purposes,for example in my country they use it to save important documentations and its also helpful in ID registration issues,or let's take porsche they are going to integrate it with their system,I just want to say that there are a lot of facts which you need to know and after this you will get answer yourself.
For me there are already a lot of good,useful altcoins which is very helpful to use everday,especially litecoin and ethereum.So there are a lot of examples and coins which you can to use in to achieve your special goals,What you need is just a knowledge and desire.