i think the best investment for now , bitcoin .. i see bitcoin from 2014 and now 2017 , the price is very shocked . . and many more country accept this bitcoin ,, more reason i have why must hold bitcoin 
Although fluctuating , but i believe bitcoin can success better than gold ..
Gold is very hard to beat, even if bitcoin reaches high prices, and that is due to the fact that bitcoin has an unstable market value and risky to put a lot of money into, unlike gold which has been for many years the go to for people who want to save a large amount of money while letting it grow, because it is stable, but I think it depends on the person whether they are willing to wait for a long-time ore for a short time. Although fluctuating , but i believe bitcoin can success better than gold ..
But for those who like to take a bit of risk and want to make money in a short period of time, bitcoin is perfect for an additional investment cell.