Because an investment takes time to mature- if you need the money in the next five years you shouldn't be investing it you should be saving it. Also, you may not have a successful investment and may not receive anything back.
In North Korea Kim jong un is the leader. Because of this the low electricity means he can control what the people watch on tv, hear on the radio. If they can do these things at all, he means to control what the people think and to do this he cuts the power.
