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.
Remember we must deal with all of the risks.
But OP can try to take a look at the ROI site to decide what step must be taken by him. So many newbies are feeling confused to determine which is the best way to invest.
Capital doesn't matter a lot but how low you can buy your token will determine the result of your return.