In my opinion, bitcoin is the best investment at this time. The other options are either too risky or scams. Do your own research and be careful before investing.
The ZCash could be the best invesetment in the long term. But the price now is too high to be investable.
Zcash is a hyped coin with good marketing and you cant just purchase the coins at the moment and i do not think the price will hold like this in the long term,first lets have some clarity regarding the development of the coin and then plan on investing in it for the long term