Can anyone share me your thoughts which way is the best way to invest and where should i invest? In which currency and which exchange?
There is no best,everything has pros and cons.
If you want profit then find the right coin for you which might depends on investment period and capital investment.
Oh sad you are replying after 10 months to this OP. He seems not active for his own thread.
Please do not mind these kind of people for the random thread dude. You may see many people just open such thread and leave as it is. If we unwantedly reply for such dead thread will not be useful for us.