I have some experience regarding bitcoin and i also run few rigs to mine bitcoin, Etherium or Zcash,

Basically there are several methods to make money with these cryptocurrencies first of all you can mine them using expensive Graphic cards second you can trade them
but some how it is more easier to make money mining than trading them, if you can invest round about 3000$ you can make around 300$ per month Considering the difficulty does not increase, ROI in 10 months than you will make start making profits. you can also buy cheap second hand cards and start mining.