I have read that bitcoin will not just reach 2k $ but it will possibly reach 1 million $ each. This was a statement by a big CHinese miner. This claim is not sure to happen but theres no harm of saving bitcoins and investing money in it since even it will not reach 1 million $ the fact that it increases in value is very beneficial to me. Investing in bitcoin for me is flawless.
I think bitcoin has good chance to reach $2k in two years later as long there is no problem and it spread widely more than nowadays.
There is no difference when someone invests his money if he uses fiat money or bitcoins. Always if you want a big profit you would take a big risk and vice versa. On the other side I read big expectations that bitcoin price will be dramatically increased shortly but nobody can explain the reasons.