Yes, I don`t think that world economic can evade this. It could be realized by choosing one cryptocurrency in which you could easily convert other currencies.
It is a very good idea. You need to study the past of this currency and invest in it. For some period of time, you can sell all convert into some other.
The transition in cryptocurrency takes place very quickly and effectively so nothing can prevent investors from investing in this market. I think this is just the beginning of an extremely cryptocurrency market in the future.